100个常用的JS代码

实现字符串长度截

function cutstr(str, len) { var temp; var icount = 0; var patrn = /\x00-\xff/; var strre = ""; for (var i = 0; i < str.length; i++) { if (icount < len - ) { temp = str.substr(i, ); if (patrn.exec(temp) == null) { icount = icount +  } else { icount = icount +  } strre += temp } else { break } } return strre + "..." }

获取域名主机

function getHost(url) { var host = "null"; if(typeof url  "undefined"|| null  url) { url = window.location.href; } var regex = /\w+\:\/\/([\/])./; var match = url.match(regex); if(typeof match != "undefined" && null != match) { host = match[]; } return host; }

清除空格

String.prototype.trim = function() { var reExtraSpace = /^\s(.?)\s+/; return this.replace(reExtraSpace, "") }

替换全部

String.prototype.replaceAll = function(s, s) { return this.replace(new RegExp(s, "gm"), s) }

转义html标签

function HtmlEncode(text) { return text.replace(/&/g, '&').replace(/"/g, '"').replace(/, '<').replace(/>/g, '>') }

纯js 原生JavaScript还原html标签

function HtmlDecode(text) { return text.replace(/&/g, '&').replace(/"/g, '"').replace(/, '<').replace(/>/g, '>') }

时间日期格式转换

Date.prototype.Format = function(formatStr) { var str = formatStr; var Week = ['日', '一', '二', '三', '四', '五', '六']; str = str.replace(/yyyy|YYYY/, this.getFullYear()); str = str.replace(/yy|YY/, (this.getYear() % 00) > 9 ? (this.getYear() % 00).toString() : '0' + (this.getYear() % 00)); str = str.replace(/MM/, (this.getMonth() + ) > 9 ? (this.getMonth() + ).toString() : '0' + (this.getMonth() + )); str = str.replace(/M/g, (this.getMonth() + )); str = str.replace(/w|W/g, Week[this.getDay()]); str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate()); str = str.replace(/d|D/g, this.getDate()); str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours()); str = str.replace(/h|H/g, this.getHours()); str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes()); str = str.replace(/m/g, this.getMinutes()); str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds()); str = str.replace(/s|S/g, this.getSeconds()); return str }

判断是否为数字类型

function isDigit(value) { var patrn = /^[0-9]*$/; if (patrn.exec(value)  null || value  "") { return false } else { return true } }

设置cookie值

function setCookie(name, value, Hours) { var d = new Date(); var offset = 8; var utc = d.getTime() + (d.getTimezoneOffset()  60000); var nd = utc + (600000  offset); var exp = new Date(nd); exp.setTime(exp.getTime() + Hours  60  60 * 000); document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=60doc.com;" }

获取cookie值

function getCookie(name) { var arr = document.cookie.match(new RegExp("(^| )" + name + "=(;*)(;|$)")); if (arr != null) return unescape(arr[]); return null }

加入收藏夹

function AddFavorite(sURL, sTitle) { try { window.external.addFavorite(sURL, sTitle) } catch(e) { try { window.sidebar.addPanel(sTitle, sURL, "") } catch(e) { alert("加入收藏失败，请使用Ctrl+D进行添加") } } }

设为首页

function setHomepage() { if (document.all) { document.body.style.behavior = 'url(#default#homepage)'; document.body.setHomePage('http://') } else if (window.sidebar) { if (window.netscape) { try { netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect") } catch(e) { alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true") } } var prefs = Components.classes['@mozilla.org/preferences-service;'].getService(Components.interfaces.nsIPrefBranch); prefs.setCharPref('browser.startup.homepage', 'http://') } }

判断IE6

var ua = navigator.userAgent.toLowerCase(); var isIE6 = ua.indexOf("msie 6") > -; if (isIE6) { try { document.execCommand("BackgroundImageCache", false, true) } catch(e) {} }

加载样式文件

function LoadStyle(url) { try { document.createStyleSheet(url) } catch(e) { var cssLink = document.createElement('link'); cssLink.rel = 'stylesheet'; cssLink.type = 'text/css'; cssLink.href = url; var head = document.getElementsByTagName('head')[0]; head.appendChild(cssLink) } }

返回脚本内容

function evalscript(s) { if(s.indexOf('<script'< span>) == -) return s; var p = /]?>(\x00?)<\ script="">/ig; var arr = []; while(arr = p.exec(s)) { var p = /]?src="(>?)">*?(reload="")?(?:charset="([\w-]+?)")?><\ script="">/i; var arr = []; arr = p.exec(arr[0]); if(arr) { appendscript(arr[], '', arr[], arr[]); } else { p = /; arr = p.exec(arr[0]); appendscript('', arr[], arr[].indexOf('reload=') != -); } } return s; }

清除脚本内容

function stripscript(s) { return s.replace(/, ''); }

动态加载脚本文件

function appendscript(src, text, reload, charset) { var id = hash(src + text); if(!reload && in_array(id, evalscripts)) return; if(reload && $(id)) { $(id).parentNode.removeChild($(id)); } evalscripts.push(id); var scriptNode = document.createElement("script"); scriptNode.type = "text/javascript"; scriptNode.id = id; scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset); try { if(src) { scriptNode.src = src; scriptNode.onloadDone = false; scriptNode.onload = function () { scriptNode.onloadDone = true; JSLOADED[src] = ; }; scriptNode.onreadystatechange = function () { if((scriptNode.readyState  'loaded' || scriptNode.readyState  'complete') && !scriptNode.onloadDone) { scriptNode.onloadDone = true; JSLOADED[src] = ; } }; } else if(text){ scriptNode.text = text; } document.getElementsByTagName('head')[0].appendChild(scriptNode); } catch(e) {} }

返回按ID检索的元素对象

function $(id) { return !id ? null : document.getElementById(id); }

返回浏览器版本内容

function browserVersion(types) { var other = ; for(i in types) { var v = types[i] ? types[i] : i; if(USERAGENT.indexOf(v) != -) { var re = new RegExp(v + '(\/|\s)([\d\.]+)', 'ig'); var matches = re.exec(USERAGENT); var ver = matches != null ? matches[] : 0; other = ver !== 0 && v != 'mozilla' ? 0 : other; }else { var ver = 0; } eval('BROWSER.' + i + '= ver'); } BROWSER.other = other; }

元素显示的通用方法

function $(id) { return !id ? null : document.getElementById(id); } function display(id) { var obj = $(id); if(obj.style.visibility) { obj.style.visibility = obj.style.visibility == 'visible' ? 'hidden' : 'visible'; } else { obj.style.display = obj.style.display == '' ? 'none' : ''; } }

中有insertBefore方法,可惜却没有insertAfter方法?用如下函数实现

function insertAfter(newChild,refChild){ var parElem=refChild.parentNode; if(parElem.lastChild==refChild){ refChild.appendChild(newChild); }else{ parElem.insertBefore(newChild,refChild.nextSibling); } }

中兼容浏览器绑定元素事件

function addEventSamp(obj,evt,fn){ if (obj.addEventListener) { obj.addEventListener(evt, fn, false); }else if(obj.attachEvent){ obj.attachEvent('on'+evt,fn); } }

光标停在文字的后面，文本框获得焦点时调用

function focusLast(){ var e = event.srcElement; var r =e.createTextRange(); r.moveStart('character',e.value.length); r.collapse(true); r.select(); }

检验URL链接是否有效

function getUrlState(URL){ var xmlhttp = new ActiveXObject("microsoft.xmlhttp"); xmlhttp.Open("GET",URL, false); try{ xmlhttp.Send(); }catch(e){ }finally{ var result = xmlhttp.responseText; if(result){ if(xmlhttp.Status==00){ return(true); }else{ return(false); } }else{ return(false); } } }

格式化CSS样式代码

function formatCss(s){//格式化代码 s = s.replace(/\s([{}:\;\,])\s/g, "$"); s = s.replace(/;\s*;/g, ";"); //清除连续分号 s = s.replace(/\,[\s\.\#\d]*{/g, "{"); s = s.replace(/([^\s])\{([^\s])/g, "$ {\n\t$"); s = s.replace(/([^\s])\}([^\n]*)/g, "$\n}\n$"); s = s.replace(/([^\s]);([^\s\}])/g, "$;\n\t$"); return s; }

压缩CSS样式代码

function yasuoCss (s) {//压缩代码 s = s.replace(/\/*(.|\n)?*\//g, ""); //删除注释 s = s.replace(/\s([{}:\;\,])\s/g, "$"); s = s.replace(/\,[\s.#\d]{/g, "{"); //容错处理 s = s.replace(/;\s;/g, ";"); //清除连续分号 s = s.match(/^\s(\S+(\s+\S+))\s$/); //去掉首尾空白 return (s == null) ? "" : s[]; }

获取当前路径

var currentPageUrl = ""; if (typeof this.href === "undefined") { currentPageUrl = document.location.toString().toLowerCase(); } else { currentPageUrl = this.href.toString().toLowerCase(); }

IP转成整型

function _ipint(ip){ var num = 0; ip = ip.split("."); num = Number(ip[0])  56  56  56 + Number(ip[])  56  56 + Number(ip[])  56 + Number(ip[]); num = num >>> 0; return num; }

整型解析为IP地址

function _intiP(num){ var str; var tt = new Array(); tt[0] = (num >>> 4) >>> 0; tt[] = ((num << 8) >>> 4) >>> 0; tt[] = (num << 6) >>> 4; tt[] = (num << 4) >>> 4; str = String(tt[0]) + "." + String(tt[]) + "." + String(tt[]) + "." + String(tt[]); return str; }

实现checkbox全选与全不选

function checkAll() { var selectall = document.getElementById("selectall"); var allbox = document.getElementsByName("allbox"); if (selectall.checked) { for (var i = 0; i < allbox.length; i++) { allbox[i].checked = true; } } else { for (var i = 0; i < allbox.length; i++) { allbox[i].checked = false; } } }

判断是否移动设备

function isMobile(){ if (typeof this.isMobile === 'boolean'){ return this.isMobile; } var screenWidth = this.getScreenWidth(); var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new"); if(!fixViewPortsExperiment){ if(!this.isAppleMobileDevice()){ screenWidth = screenWidth/window.devicePixelRatio; } } var isMobileScreenSize = screenWidth < 600; var isMobileUserAgent = false; this.isMobile = isMobileScreenSize && this.isTouchScreen(); return this.isMobile; }

判断是否移动设备访问

function isMobileUserAgent(){ return (/iphone|ipod|android.mobile|windows.phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase())); }

判断是否苹果移动设备访问

function isAppleMobileDevice(){  return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));  }

判断是否安卓移动设备访问

function isAndroidMobileDevice(){  return (/android/i.test(navigator.userAgent.toLowerCase()));  }

判断是否Touch屏幕

function isTouchScreen(){  return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);  }

判断是否在安卓上的谷歌浏览器

function isNewChromeOnAndroid(){ if(this.isAndroidMobileDevice()){ var userAgent = navigator.userAgent.toLowerCase(); if((/chrome/i.test(userAgent))){ var parts = userAgent.split('chrome/'); var fullVersionString = parts[].split(" ")[0]; var versionString = fullVersionString.split('.')[0]; var version = parseInt(versionString); if(version >= 7){ return true; } } } return false; }

判断是否打开视窗

function isViewportOpen() {  return !!document.getElementById('wixMobileViewport');  }

获取移动设备初始化大小

function getInitZoom(){ if(!this.initZoom){ var screenWidth = Math.min(screen.height, screen.width); if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ screenWidth = screenWidth/window.devicePixelRatio; } this.initZoom = screenWidth /document.body.offsetWidth; } return this._initZoom; }

获取移动设备最大化大小

function getZoom(){ var screenWidth = (Math.abs(window.orientation) = 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width); if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ screenWidth = screenWidth/window.devicePixelRatio; } var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment = "New" || FixViewPortsExperiment === "new"); if(FixViewPortsExperimentRunning){ return screenWidth / window.innerWidth; }else{ return screenWidth / document.body.offsetWidth; } }

获取移动设备屏幕宽度

function getScreenWidth(){ var smallerSide = Math.min(screen.width, screen.height); var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new"); if(fixViewPortsExperiment){ if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ smallerSide = smallerSide/window.devicePixelRatio; } } return smallerSide; }

完美判断是否为网址

function IsURL(strUrl) { var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(.[-a-z0-9]+).(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|a-z|((5[0-5])|([0-4]\d)|(\d\d)|([-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%$])?)$/i if (regular.test(strUrl)) { return true; } else { return false; } }

根据样式名称检索元素对象

function getElementsByClassName(name) { var tags = document.getElementsByTagName('*') || document.all; var els = []; for (var i = 0; i < tags.length; i++) { if (tags[i].className) { var cs = tags[i].className.split(' '); for (var j = 0; j < cs.length; j++) { if (name == cs[j]) { els.push(tags[i]); break } } } } return els }

判断是否以某个字符串开头

 String.prototype.startWith = function (s) {  return this.indexOf(s) == 0  }

判断是否以某个字符串结束

 String.prototype.endWith = function (s) {  var d = this.length - s.length;  return (d >= 0 && this.lastIndexOf(s) == d) 4 }

返回IE浏览器的版本号

function getIE(){ if (window.ActiveXObject){ var v = navigator.userAgent.match(/MSIE (;+)/)[]; return parseFloat(v.substring(0, v.indexOf("."))) } return false }

获取页面高度

function getPageHeight(){ var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat" ? a : g.documentElement; return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight); }

获取页面scrollLeft

function getPageScrollLeft(){  var a = document;  return a.documentElement.scrollLeft || a.body.scrollLeft; 4 }

获取页面可视宽度

function getPageViewWidth(){ var d = document, a = d.compatMode == "BackCompat" ? d.body : d.documentElement; return a.clientWidth; }

获取页面宽度

function getPageWidth(){ var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat" ? a : g.documentElement; return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth); }

获取页面scrollTop

function getPageScrollTop(){  var a = document;  return a.documentElement.scrollTop || a.body.scrollTop; 4 }

获取页面可视高度

function getPageViewHeight() { var d = document, a = d.compatMode == "BackCompat" ? d.body : d.documentElement; return a.clientHeight; }

跨浏览器添加事件

function addEvt(oTarget,sEvtType,fnHandle){ if(!oTarget){return;} if(oTarget.addEventListener){ oTarget.addEventListener(sEvtType,fnHandle,false); }else if(oTarget.attachEvent){ oTarget.attachEvent("on" + sEvtType,fnHandle); }else{ oTarget["on" + sEvtType] = fnHandle; } }

跨浏览器删除事件

function delEvt(oTarget,sEvtType,fnHandle){ if(!oTarget){return;} if(oTarget.addEventListener){ oTarget.addEventListener(sEvtType,fnHandle,false); }else if(oTarget.attachEvent){ oTarget.attachEvent("on" + sEvtType,fnHandle); }else{ oTarget["on" + sEvtType] = fnHandle; } }

去掉url前缀

function removeUrlPrefix(a){ a=a.replace(/：/g,":").replace(/．/g,".").replace(/／/g,"/"); while(trim(a).toLowerCase().indexOf("http://")==0){ a=trim(a.replace(/http:\/\//i,"")); } return a; }

随机数时间戳

function uniqueId(){  var a=Math.random,b=parseInt;  return Number(new Date()).toString()+b(0a())+b(0a())+b(0*a()); 4 }

全角半角转换,iCase: 0全到半，半到全，其他不转化

function chgCase(sStr,iCase){ if(typeof sStr != "string" || sStr.length <= 0 || !(iCase === 0 || iCase == )){ return sStr; } var i,oRs=[],iCode; if(iCase){/半->全/ for(i=0; i<sstr.length;i+=){ iCode = sStr.charCodeAt(i); if(iCode == ){ iCode = 88; }else if(iCode < 7){ iCode += 6548; } oRs.push(String.fromCharCode(iCode)); } }else{/全->半/ for(i=0; i<sstr.length;i+=){ iCode = sStr.charCodeAt(i); if(iCode == 88){ iCode = ; }else if(iCode > 6580 && iCode < 6575){ iCode -= 6548; } oRs.push(String.fromCharCode(iCode)); } } return oRs.join(""); }

确认是否键盘有效输入值

function checkKey(iKey){ if(iKey   || iKey  9){return true;}/空格和异常/ if(iKey>47 && iKey < 58){return true;}/数字/ if(iKey>64 && iKey < 9){return true;}/字母/ if(iKey>95 && iKey < 08){return true;}/数字键盘/ if(iKey>08 && iKey < ){return true;}/数字键盘/ if(iKey>85 && iKey < 9){return true;}/符号/ if(iKey>8 && iKey < ){return true;}/符号/ return false; }

获取网页被卷去的位置

function getScrollXY() { return document.body.scrollTop ? { x: document.body.scrollLeft, y: document.body.scrollTop }: { x: document.documentElement.scrollLeft, y: document.documentElement.scrollTop } }

另一种正则日期格式化函数+调用方法

Date.prototype.format = function(format){ //author: meizz var o = { "M+" : this.getMonth()+, //month "d+" : this.getDate(), //day "h+" : this.getHours(), //hour "m+" : this.getMinutes(), //minute "s+" : this.getSeconds(), //second "q+" : Math.floor((this.getMonth()+)/), //quarter "S" : this.getMilliseconds() //millisecond } if(/(y+)/.test(format)) format=format.replace(RegExp., (this.getFullYear()+"").substr(4 - RegExp..length)); for(var k in o)if(new RegExp("("+ k +")").test(format)) format = format.replace(RegExp., RegExp..length== ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length)); return format; } alert(new Date().format("yyyy-MM-dd hh:mm:ss"));

时间个性化输出功能

/* 、< 60s, 显示为“刚刚” 、>= min && < 60 min, 显示与当前时间差“XX分钟前” 、>= 60min && < day, 显示与当前时间差“今天 XX:XX” 4、>= day && < year, 显示日期“XX月XX日 XX:XX” 5、>= year, 显示具体日期“XXXX年XX月XX日 XX:XX” */ function timeFormat(time){ var date = new Date(time) , curDate = new Date() , year = date.getFullYear() , month = date.getMonth() +  , day = date.getDate() , hour = date.getHours() , minute = date.getMinutes() , curYear = curDate.getFullYear() , curHour = curDate.getHours() , timeStr; if(year < curYear){ timeStr = year +'年'+ month +'月'+ day +'日 '+ hour +':'+ minute; }else{ var pastTime = curDate - date , pastH = pastTime/600000; if(pastH > curHour){ timeStr = month +'月'+ day +'日 '+ hour +':'+ minute; }else if(pastH >= ){ timeStr = '今天 ' + hour +':'+ minute +'分'; }else{ var pastM = curDate.getMinutes() - minute; if(pastM > ){ timeStr = pastM +'分钟前'; }else{ timeStr = '刚刚'; } } } return timeStr; }

解决offsetX兼容性问题

// 针对火狐不支持offsetX/Y function getOffset(e){ var target = e.target, // 当前触发的目标对象 eventCoord, pageCoord, offsetCoord; // 计算当前触发元素到文档的距离 pageCoord = getPageCoord(target); // 计算光标到文档的距离 eventCoord = { X : window.pageXOffset + e.clientX, Y : window.pageYOffset + e.clientY }; // 相减获取光标到第一个定位的父元素的坐标 offsetCoord = { X : eventCoord.X - pageCoord.X, Y : eventCoord.Y - pageCoord.Y }; return offsetCoord; } function getPageCoord(element){ var coord = { X : 0, Y : 0 }; // 计算从当前触发元素到根节点为止， // 各级 offsetParent 元素的 offsetLeft 或 offsetTop 值之和 while (element){ coord.X += element.offsetLeft; coord.Y += element.offsetTop; element = element.offsetParent; } return coord; }

常用的正则表达式

//正整数 /^[0-9]-9/; //负整数 /^-[0-9]*[-9][0-9]*/; //正浮点数 /^(([0-9]+.[0-9]-9)|([0-9]-9.[0-9]+)|([0-9]-9))/; //负浮点数 /^(-(([0-9]+\.[0-9]*[-9][0-9]*)|([0-9]*[-9][0-9]*\.[0-9]+)|([0-9]*[-9][0-9]*)))/; //浮点数 /^(-?\d+)(.\d+)?/; //email地址 /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+/; //url地址 /^[a-zA-z]+://(\w+(-\w+))(.(\w+(-\w+)))(\?\S)?/; //年/月/日（年-月-日、年.月.日） /^(9|0)\d\d[- /.](0[-9]|[0])[- /.](0[-9]|[][0-9]|[0])/; //匹配中文字符 /[\u4e00-\u9fa5]/; //匹配帐号是否合法(字母开头，允许5-0字节，允许字母数字下划线) /^a-zA-Z{4,9}/; //匹配空白行的正则表达式 /\n\s*\r/; //匹配中国邮政编码 /[-9]\d{5}(?!\d)/; //匹配身份证 /\d{5}|\d{8}/; //匹配国内电话号码 /(\d{}-|\d{4}-)?(\d{8}|\d{7})?/; //匹配IP地址 /(([0-4]\d|5[0-5]|[0]?\d\d?)\.){}([0-4]\d|5[0-5]|[0]?\d\d?)/; //匹配首尾空白字符的正则表达式 /^\s*|\s*/; //匹配HTML标记的正则表达式 < (\S?)>>.?|< .? />;

实现返回顶部的通用方法

function backTop(btnId) { var btn = document.getElementById(btnId); var d = document.documentElement; var b = document.body; window.onscroll = set; btn.style.display = "none"; btn.onclick = function() { btn.style.display = "none"; window.onscroll = null; this.timer = setInterval(function() { d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop)  0.); b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop)  0.); if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set); }, 0); }; function set() { btn.style.display = (d.scrollTop + b.scrollTop > 00) ? 'block': "none" } }; backTop('goTop');

获得URL中GET参数值

// 用法：如果地址是 test.htm?t=&t=&t=, 那么能取得：GET["t"], GET["t"], GET["t"] function get_get(){ querystr = window.location.href.split("?") if(querystr[]){ GETs = querystr[].split("&") GET =new Array() for(i=0;i<gets.length;i++){ tmp_arr = GETs[i].split("=") key=tmp_arr[0] GET[key] = tmp_arr[] } } return querystr[]; }

实现全选通用方法

function checkall(form, prefix, checkall) { var checkall = checkall ? checkall : 'chkall'; for(var i = 0; i < form.elements.length; i++) { var e = form.elements[i]; if(e.type=="checkbox"){ e.checked = form.elements[checkall].checked; } } }

实现全部取消选择通用方法

function uncheckAll(form) { for (var i=0;i<form.elements.length;i++){ var e = form.elements[i]; if (e.name != 'chkall') e.checked=!e.checked; } }

实现打开一个窗体通用方法

function openWindow(url,windowName,width,height){ var x = parseInt(screen.width / .0) - (width / .0); var y = parseInt(screen.height / .0) - (height / .0); var isMSIE= (navigator.appName == "Microsoft Internet Explorer"); if (isMSIE) { var p = "resizable=,location=no,scrollbars=no,width="; p = p+width; p = p+",height="; p = p+height; p = p+",left="; p = p+x; p = p+",top="; p = p+y; retval = window.open(url, windowName, p); } else { var win = window.open(url, "ZyiisPopup", "top=" + y + ",left=" + x + ",scrollbars=" + scrollbars + ",dialog=yes,modal=yes,width=" + width + ",height=" + height + ",resizable=no" ); eval("try { win.resizeTo(width, height); } catch(e) { }"); win.focus(); } }

判断是否为客户端设备

function client(o){ var b = navigator.userAgent.toLowerCase(); var t = false; if (o == 'isOP'){ t = b.indexOf('opera') > -; } if (o == 'isIE'){ t = b.indexOf('msie') > -; } if (o == 'isFF'){ t = b.indexOf('firefox') > -; } return t; }

获取单选按钮的值

function get_radio_value(field){ if(field&&field.length){ for(var i=0;i<field.length;i++){ if(field[i].checked){ return field[i].value; } } }else { return ; } }

获取复选框的值

function get_checkbox_value(field){ if(field&&field.length){ for(var i=0;i<field.length;i++){ if(field[i].checked && !field[i].disabled){ return field[i].value; } } }else { return; } }

判断是否为邮箱

function isEmail(str){ var re=/^\w+((-\w+)|(.\w+))\@[A-Za-z0-9]+((.|-)[A-Za-z0-9]+).[A-Za-z0-9]+$/; if (re.test(str) != true) { return false; }else{ return true; } }

判断是否有列表中的危险字符

function isValidReg(chars){ var re=/<|>|[|]|{|}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|*|@|#|^|\/; if (re.test( chars) == true) { return false; }else{ return true; } }

判断字符串是否大于规定的长度

function isValidLength(chars, len) { if (chars.length < len) { return false; } return true; }

判断字符串是为网址不区分大小写

function isValidURL( chars ) { var re=/^(hH{}[pP]:\/\/|hH{}pP:\/\/)(\S+.\S+)$/; if (!isNULL(chars)) { chars = jsTrim(chars); if (chars.match(re) == null) return false; else return true; } return false; }

判断字符串是否为小数

function isValidDecimal( chars ) { var re=/^\d*.?\d{,}$/; if (chars.match(re) == null) return false; else return true; }

判断字符串是否为整数

function isNumber( chars ) { var re=/^\d*$/; if (chars.match(re) == null) return false; else return true; }

判断字符串是否为浮点数

function isFloat( str ) { for(i=0;i<str.length;i++) { if ((str.charAt(i)<"0" || str.charAt(i)>"9")&& str.charAt(i) != '.'){ return false; } } return true; }

判断字符是否为A-Za-z英文字母

function isLetters( str ){ var re=/^[A-Za-z]+$/; if (str.match(re) == null) return false; else return true; }

判断字符串是否邮政编码

function isValidPost( chars ) { var re=/^\d{6}$/; if (chars.match(re) == null) return false; else return true; }

判断字符是否空NULL

function isNULL( chars ) { if (chars  null) return true; if (jsTrim(chars).length0) return true; return false; }

用正则表达式提取页面代码中所有网址

var aa = document.documentElement.outerHTML.match(/(url(|src=|href=)["']("'()<>[] +)["')]|(http:\/\/[\w-.]+"'()<>[] +)/ig).join("\r\n").replace(/^(src=|href=|url()["']|["'>) ]$/igm,"");  alert(aa)

用正则表达式清除相同的数组(低效率)

 Array.prototype.unique=function(){  return this.reverse().join(",").match(/(,+)(?!.*\)/ig).reverse();  }

用正则表达式清除相同的数组(高效率)

String.prototype.unique=function(){ var x=this.split(/[\r\n]+/); var y=''; for(var i=0;i<x.length;i++){ if(!new RegExp(""+x[i].replace(/([\w])/ig,"\")+"","igm").test(y)){ y+=x[i]+"\r\n" } } return y }

用正则表达式按字母排序，对每行进行数组排序

 function SetSort(){  var text=K.value.split(/[\r\n]/).sort().join("\r\n");//顺序  var test=K.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序K.value=K.value!=text?text:test; 5 }

字符串反序

 function IsReverse(text){  return text.split('').reverse().join('');  }

用正则表达式清除html代码中的脚本

 function clear_script(){  K.value=K.value.replace(/,"");  }

动态执行JavaScript脚本

function javascript(){ try{ eval(K.value); }catch(e){ alert(e.message); } }

动态执行VBScript脚本

function vbscript(){ try{ var script=document.getElementById("K").value; if(script.trim()=="")return; window.execScript('On Error Resume Next \n'+script+'\n If Err.Number<>0 Then \n MsgBox "请输入正确的VBScript脚本!",48,"脚本错误!" \n End If',"vbscript") }catch(e){ alert(e.message); } }

实现金额大写转换函数

function transform(tranvalue) { try { var i = ; var dw = new Array("", "万", "亿"); //大单位 var dw = new Array("拾", "佰", "仟"); //小单位 var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用 //以下是小写转换成大写显示在合计大写的文本框中 //分离整数与小数 var source = splits(tranvalue); var num = source[0]; var dig = source[]; //转换整数部分 var k = 0; //计小单位 var k = 0; //计大单位 var sum = 0; var str = ""; var len = source[0].length; //整数的长度 for (i = ; i <= len; i++) { var n = source[0].charAt(len - i); //取得某个位数上的数字 var bn = 0; if (len - i -  >= 0) { bn = source[0].charAt(len - i - ); //取得某个位数前一位上的数字 } sum = sum + Number(n); if (sum != 0) { str = dw[Number(n)].concat(str); //取得该数字对应的大写数字，并插入到str字符串的前面 if (n == '0') sum = 0; } if (len - i -  >= 0) { //在数字范围内 if (k != ) { //加小单位 if (bn != 0) { str = dw[k].concat(str); } k++; } else { //不加小单位，加大单位 k = 0; var temp = str.charAt(0); if (temp  "万" || temp  "亿") //若大单位前没有数字则舍去大单位 str = str.substr(, str.length - ); str = dw[k].concat(str); sum = 0; } } if (k == ) //小单位到千则大单位进一 { k++; } } //转换小数部分 var strdig = ""; if (dig != "") { var n = dig.charAt(0); if (n != 0) { strdig += dw[Number(n)] + "角"; //加数字 } var n = dig.charAt(); if (n != 0) { strdig += dw[Number(n)] + "分"; //加数字 } } str += "元" + strdig; } catch(e) { return "0元"; } return str; } //拆分整数与小数 function splits(tranvalue) { var value = new Array('', ''); temp = tranvalue.split("."); for (var i = 0; i < temp.length; i++) { value[i] = temp[i]; } return value; }

常用的正则表达式大收集

匹配中文字符的正则表达式： [\u4e00-\u9fa5] 匹配双字节字符（包括汉字在内）：\x00-\xff 匹配空行的正则表达式：\n[\s| ]\r 匹配 HTML 标记的正则表达式：<(.)>.<\/\>|<(.)> 匹配首尾空格的正则表达式：(^\s)|(\s) 匹配 IP 地址的正则表达式：/(\d+)\.(\d+)\.(\d+)\.(\d+)/g 匹配 Email 地址的正则表达式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 匹配网址 URL 的正则表达式：http:_//(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?_ sql 语句：^(select|drop|delete|create|update|insert).* 非负整数：^\d+ 正整数：^[0-9]*[-9][0-9]* 非正整数：^((-\d+)|(0+)) 负整数：^-[0-9]*[-9][0-9]* 整数：^-?\d+ 非负浮点数：^\d+(\.\d+)? 正浮点数：^((0-9)+.[0-9]-9)|([0-9]-9.[0-9]+)|([0-9]-9)) 非正浮点数：^((-\d+\.\d+)?)|(0+(\.0+)?)) 英文字符串：^[A-Za-z]+ 英文大写串：^[A-Z]+ 英文小写串：^[a-z]+ 英文字符数字串：^[A-Za-z0-9]+ 英数字加下划线串：^\w+ E-mail地址：^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+ URL：^[a-zA-Z]+://(\w+(-\w+))(.(\w+(-\w+)))(\?\s)?$ 或：^http:\/\/[A-Za-z0-9]+.[A-Za-z0-9]+[\/=\?%-&~@[]':+!](<>"")_ 邮政编码：^[-9]\d{5} 电话号码：^(((\d{,}))|(\d{}-))?((0\d{,})|0\d{,}-)?[-9]\d{6,7}(-\d{,4})? 手机号码：^((\(\d{,}\))|(\d{}\-))?\d{9} 双字节字符（包括汉字在内）：^\x00-\xff 匹配首尾空格：(^\s)|(\s) 匹配 HTML 标记：<(.*)>.*<\/\>|<(.*)> 匹配空行：\n[\s| ]*\r 提取信息中的网络链接：(h|H)(r|R)(e|E)(f|F) = ('|")?(\w|\\|\/|\.)+('|"| |>)? 提取信息中的邮件地址：\w+([-+.]\w+)@\w+([-.]\w+)*\.\w+([-.]\w+)* 提取信息中的图片链接：(s|S)(r|R)(c|C) = ('|")?(\w|\\|\/|\.)+('|"| |>)? 提取信息中的 IP 地址：(\d+)\.(\d+)\.(\d+)\.(\d+) 提取信息中的中国手机号码：(86)0*\d{9} 提取信息中的中国固定电话号码：(\(\d{,4}\)|\d{,4}-|\s)?\d{8} 提取信息中的中国电话号码（包括移动和固定电话）：(\(\d{,4}\)|\d{,4}-|\s)?\d{7,4} 提取信息中的中国邮政编码：[-9]{}(\d+){5} 提取信息中的浮点数（即小数）：(-?\d*)\.?\d+ 提取信息中的任何数字 ：(-?\d*)(\.\d+)? IP：(\d+)\.(\d+)\.(\d+)\.(\d+) 电话区号：^0\d{,} 腾讯 QQ 号：^[-9]-9 帐号（字母开头，允许 5-6 字节，允许字母数字下划线）：^[a-zA-Z][a-zA-Z0-9_]{4,5} 中文、英文、数字及下划线：^[\u4e00-\u9fa5_a-zA-Z0-9]+$

实现窗体改变事件resize的操作

兼容所以的浏览器

(function(){ var fn = function(){ var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth ,r = 55 ,b = Element.extend(document.body) ,classname = b.className; if(w < r){ //当窗体的宽度小于55的时候执行相应的操作 }else{ //当窗体的宽度大于55的时候执行相应的操作 } } if(window.addEventListener){ window.addEventListener('resize', function(){ fn(); }); }else if(window.attachEvent){ window.attachEvent('onresize', function(){ fn(); }); } fn(); })();

用正则清除空格分左右

 function ltrim(s){ return s.replace( /^(\s*| )/, ""); }  function rtrim(s){ return s.replace( /(\s| *)$/, ""); }  function trim(s){ return ltrim(rtrim(s));}

判断变量是否空值

/  判断变量是否空值  undefined, null, '', false, 0, [], {} 均返回true，否则返回false */ function empty(v){ switch (typeof v){ case 'undefined' : return true; case 'string' : if(trim(v).length == 0) return true; break; case 'boolean' : if(!v) return true; break; case 'number' : if(0 = v) return true; break; case 'object' : if(null = v) return true; if(undefined !== v.length && v.length==0) return true; for(var k in v){return false;} return true; break; } return false; }

实现base64解码

function base64_decode(data){ var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0456789+/="; var o, o, o, h, h, h, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = []; if (!data) { return data; } data += ''; do { h = b64.indexOf(data.charAt(i++)); h = b64.indexOf(data.charAt(i++)); h = b64.indexOf(data.charAt(i++)); h4 = b64.indexOf(data.charAt(i++)); bits = h << 8 | h <<  | h << 6 | h4; o = bits >> 6 & 0xff; o = bits >> 8 & 0xff; o = bits & 0xff; if (h == 64) { tmp_arr[ac++] = String.fromCharCode(o); } else if (h4 == 64) { tmp_arr[ac++] = String.fromCharCode(o, o); } else { tmp_arr[ac++] = String.fromCharCode(o, o, o); } } while (i < data.length); dec = tmp_arr.join(''); dec = utf8_decode(dec); return dec; }

实现utf8解码

function utf8_decode(str_data){ var tmp_arr = [],i = 0,ac = 0,c = 0,c = 0,c = 0;str_data += ''; while (i < str_data.length) { c = str_data.charCodeAt(i); if (c < 8) { tmp_arr[ac++] = String.fromCharCode(c); i++; } else if (c > 9 && c < 4) { c = str_data.charCodeAt(i + ); tmp_arr[ac++] = String.fromCharCode(((c & ) << 6) | (c & 6)); i += ; } else { c = str_data.charCodeAt(i + ); c = str_data.charCodeAt(i + ); tmp_arr[ac++] = String.fromCharCode(((c & 5) << ) | ((c & 6) << 6) | (c & 6)); i += ; } } return tmp_arr.join(''); }

获取窗体可见范围的宽与高

function getViewSize(){ var de=document.documentElement; var db=document.body; var viewW=de.clientWidth0 ? db.clientWidth : de.clientWidth; var viewH=de.clientHeight0 ? db.clientHeight : de.clientHeight; return Array(viewW ,viewH); }

判断IE版本号

（既简洁、又向后兼容！）

var _IE = (function(){ var v = , div = document.createElement('div'), all = div.getElementsByTagName('i'); while ( div.innerHTML = '', all[0] ); return v > 4 ? v : false ; }());

获取浏览器版本号

function browserVersion(types) { var other = ; for (i in types) { var v = types[i] ? types[i] : i; if (USERAGENT.indexOf(v) != -) { var re = new RegExp(v + '(\/|\s|:)([\d\.]+)', 'ig'); var matches = re.exec(USERAGENT); var ver = matches != null ? matches[] : 0; other = ver !== 0 && v != 'mozilla' ? 0 : other; } else { var ver = 0; } eval('BROWSER.' + i + '= ver'); } BROWSER.other = other; }

半角转换为全角函数

function ToDBC(str){ var result = ''; for(var i=0; i < str.length; i++){ code = str.charCodeAt(i); if(code >=  && code <= 6){ result += String.fromCharCode(str.charCodeAt(i) + 6548); }else if (code == ){ result += String.fromCharCode(str.charCodeAt(i) + 88 - ); }else{ result += str.charAt(i); } } return result; }

全角转换为半角函数

function ToCDB(str){ var result = ''; for(var i=0; i < str.length; i++){ code = str.charCodeAt(i); if(code >= 658 && code <= 6574){ result += String.fromCharCode(str.charCodeAt(i) - 6548); }else if (code == 88){ result += String.fromCharCode(str.charCodeAt(i) - 88 + ); }else{ result += str.charAt(i); } } return result;