100个常用JS函数

这里收集了JS常用的原生函数，可以拿去直接用。

//字符串长度截取
function cutstr(str, len) {
    var temp,
        icount = 0,
        patrn = /[^\x00-\xff]/，
        strre = "";
    for (var i = 0; i < str.length; i++) {
        if (icount < len - 1) {
            temp = str.substr(i, 1);
            if (patrn.exec(temp) == null) {
                icount = icount + 1
            } else {
                icount = icount + 2
            }
            strre += temp
        } else {
            break;
        }
    }
    return strre + "..."
}
//替换全部
String.prototype.replaceAll = function(s1, s2) {
    return this.replace(new RegExp(s1, "gm"), s2)
}
//清除空格
String.prototype.trim = function() {
    var reExtraSpace = /^\s*(.*?)\s+$/;
    return this.replace(reExtraSpace, "$1")
}
//清除左空格/右空格
function ltrim(s){ return s.replace( /^(\s*|　*)/, ""); }
function rtrim(s){ return s.replace( /(\s*|　*)$/, ""); }
//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)
}

//转义html标签
function HtmlEncode(text) {
    return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').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() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));
    str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));
    str = str.replace(/M/g, (this.getMonth() + 1));
    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 + (3600000 * offset);
    var exp = new Date(nd);
    exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);
    document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"
}
//获取cookie值
function getCookie(name) {
    var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
    if (arr != null) return unescape(arr[2]);
    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://123.com')
    } 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;1'].getService(Components.interfaces.nsIPrefBranch);
        prefs.setCharPref('browser.startup.homepage', 'http://123.com')
    }
}

//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') == -1) return s;
    var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig;
    var arr = [];
    while(arr = p.exec(s)) {
        var p1 = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i;
        var arr1 = [];
        arr1 = p1.exec(arr[0]);
        if(arr1) {
            appendscript(arr1[1], '', arr1[2], arr1[3]);
        } else {
            p1 = /<script(.*?)>([^\x00]+?)<\/script>/i;
            arr1 = p1.exec(arr[0]);
            appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1);
        }
    }
    return s;
}
//清除脚本内容
function stripscript(s) {
    return s.replace(/<script.*?>.*?<\/script>/ig, '');
}
//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] = 1;
            };
            scriptNode.onreadystatechange = function () {
                if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode.onloadDone) {
                    scriptNode.onloadDone = true;
                    JSLOADED[src] = 1;
                }
            };
        } 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);
}
//跨浏览器绑定事件
function addEventSamp(obj,evt,fn){
    if(!oTarget){return;}
    if (obj.addEventListener) {
        obj.addEventListener(evt, fn, false);
    }else if(obj.attachEvent){
        obj.attachEvent('on'+evt,fn);
    }else{
        oTarget["on" + sEvtType] = fn;
    }
}
//跨浏览器删除事件
function delEvt(obj,evt,fn){
    if(!obj){return;}
    if(obj.addEventListener){
        obj.addEventListener(evt,fn,false);
    }else if(oTarget.attachEvent){
        obj.attachEvent("on" + evt,fn);
    }else{
        obj["on" + evt] = fn;
    }
}
//为元素添加on方法
Element.prototype.on = Element.prototype.addEventListener;
NodeList.prototype.on = function (event, fn) {、
    []['forEach'].call(this, function (el) {
        el.on(event, fn);
    });
    return this;
};
//为元素添加trigger方法
Element.prototype.trigger = function (type, data) {
    var event = document.createEvent('HTMLEvents');
    event.initEvent(type, true, true);
    event.data = data || {};
    event.eventName = type;
    event.target = this;
    this.dispatchEvent(event);
    return this;
};

NodeList.prototype.trigger = function (event) {
    []['forEach'].call(this, function (el) {
        el['trigger'](event);
    });
    return this;
};


//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==200){
                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, "$1");
    s = s.replace(/;\s*;/g, ";"); //清除连续分号
    s = s.replace(/\,[\s\.\#\d]*{/g, "{");
    s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2");
    s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2");
    s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2");
    return s;
}
//压缩CSS样式代码
function compressCss (s) {//压缩代码
    s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //删除注释
    s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
    s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容错处理
    s = s.replace(/;\s*;/g, ";"); //清除连续分号
    s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白
    return (s == null) ? "" : s[1];
}
//获取当前路径
var currentPageUrl = "";
if (typeof this.href === "undefined") {
    currentPageUrl = document.location.toString().toLowerCase();
}else {
    currentPageUrl = this.href.toString().toLowerCase();
}

//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][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i
    if (regular.test(strUrl)) {
        return true;
    }else {
        return false;
    }
}
//getElementsByClassName
function getElementsByClassName(name) {
    var tags = document.getElementsByTagName('*') || document.all;
    var els = [];
    for (var i = 0; i < tags.length; i++) {
        if (tags.className) {
            var cs = tags.className.split(' ');
            for (var j = 0; j < cs.length; j++) {
                if (name == cs[j]) {
                    els.push(tags);
                    break
                }
            }
        }
    }
    return els
}

//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;
}

//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;
}

//获取页面可视高度
function getPageViewHeight() {
    var d = document, a = d.compatMode == "BackCompat"
        ? d.body
        : d.documentElement;
    return a.clientHeight;
}

//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(10*a())+b(10*a())+b(10*a());
}

//全角半角转换
//iCase: 0全到半，1半到全，其他不转化
function chgCase(sStr,iCase){
    if(typeof sStr != "string" || sStr.length <= 0 || !(iCase === 0 || iCase == 1)){
        return sStr;
    }
    var i,oRs=[],iCode;
    if(iCase){/*半->全*/
        for(i=0; i<sStr.length;i+=1){
            iCode = sStr.charCodeAt(i);
            if(iCode == 32){
                iCode = 12288;
            }else if(iCode < 127){
                iCode += 65248;
            }
            oRs.push(String.fromCharCode(iCode));
        }
    }else{/*全->半*/
        for(i=0; i<sStr.length;i+=1){
            iCode = sStr.charCodeAt(i);
            if(iCode == 12288){
                iCode = 32;
            }else if(iCode > 65280 && iCode < 65375){
                iCode -= 65248;
            }
            oRs.push(String.fromCharCode(iCode));
        }
    }
    return oRs.join("");
}

//确认是否键盘有效输入值
function checkKey(iKey){
    if(iKey == 32 || iKey == 229){return true;}/*空格和异常*/
    if(iKey>47 && iKey < 58){return true;}/*数字*/
    if(iKey>64 && iKey < 91){return true;}/*字母*/
    if(iKey>95 && iKey < 108){return true;}/*数字键盘1*/
    if(iKey>108 && iKey < 112){return true;}/*数字键盘2*/
    if(iKey>185 && iKey < 193){return true;}/*符号1*/
    if(iKey>218 && iKey < 223){return true;}/*符号2*/
    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
    }
}

//日期格式化函数+调用方法
Date.prototype.format = function(format){
    var o = {
        "M+" : this.getMonth()+1, //month
        "d+" : this.getDate(),    //day
        "h+" : this.getHours(),   //hour
        "m+" : this.getMinutes(), //minute
        "s+" : this.getSeconds(), //second
        "q+" : Math.floor((this.getMonth()+3)/3),  //quarter
        "S" : this.getMilliseconds() //millisecond
    };
    if(/(y+)/.test(format)) format=format.replace(RegExp.$1,
        (this.getFullYear()+"").substr(4 - RegExp.$1.length));
    for(var k in o){
        if(new RegExp("("+ k +")").test(format))
            format = format.replace(RegExp.$1,RegExp.$1.length==1 ? 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
/*
 1、< 60s, 显示为“刚刚”
 2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”
 3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”
 4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”
 5、>= 1year, 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() + 10,
        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/3600000;

        if(pastH > curHour){
            timeStr = month +'月'+ day +'日 '+ hour +':'+ minute;
        }else if(pastH >= 1){
            timeStr = '今天 ' + hour +':'+ minute +'分';
        }else{
            var pastM = curDate.getMinutes() - minute;
            if(pastM > 1){
                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;
}

//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) * 0.1);
            b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
            if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set);
        }, 10);
    };
    function set() {
        btn.style.display = (d.scrollTop + b.scrollTop > 100) ? 'block': "none"
    }
};
backTop('goTop');

//获得URL中GET参数值
// 用法：如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得：GET["t1"], GET["t2"], GET["t3"]
function get_get(){
    querystr = window.location.href.split("?")
    if(querystr[1]){
        GETs = querystr[1].split("&");
        GET = [];
        for(i=0;i<GETs.length;i++){
            tmp_arr = GETs.split("=")
            key=tmp_arr[0]
            GET[key] = tmp_arr[1]
        }
    }
    return querystr[1];
}

//打开一个窗体通用方法
function openWindow(url,windowName,width,height){
    var x = parseInt(screen.width / 2.0) - (width / 2.0);
    var y = parseInt(screen.height / 2.0) - (height / 2.0);
    var isMSIE= (navigator.appName == "Microsoft Internet Explorer");
    if (isMSIE) {
        var p = "resizable=1,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();
    }
}

//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);

//清除相同的数组
String.prototype.unique=function(){
    var x=this.split(/[\r\n]+/);
    var y='';
    for(var i=0;i<x.length;i++){
        if(!new RegExp("^"+x.replace(/([^\w])/ig,"\\$1")+"$","igm").test(y)){
            y+=x+"\r\n"
        }
    }
    return y
};

//按字母排序，对每行进行数组排序
function SetSort(){
    var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//顺序
    var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序
    K1.value=K1.value!=text?text:test;
}

//字符串反序
function IsReverse(text){
    return text.split('').reverse().join('');
}

//清除html代码中的脚本
function clear_script(){
    K1.value=K1.value.replace(/<script.*?>[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?"[\s\S]*?"|\s+on[a-zA-Z]{3,16}\s?=\s?'[\s\S]*?'|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,"");
}

//动态执行JavaScript脚本
function javascript(){
    try{
        eval(K1.value);
    }catch(e){
        alert(e.message);
    }
}

//动态执行VBScript脚本
function vbscript(){
    try{
        var script=document.getElementById("K1").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);
    }
}

//金额大写转换函数
function transform(tranvalue) {
    try {
        var i = 1;
        var dw2 = new Array("", "万", "亿"); //大单位
        var dw1 = 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[1];
        //转换整数部分
        var k1 = 0; //计小单位
        var k2 = 0; //计大单位
        var sum = 0;
        var str = "";
        var len = source[0].length; //整数的长度
        for (i = 1; 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 - 1 >= 0) {
                bn = source[0].charAt(len - i - 1); //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 - 1 >= 0) { //在数字范围内
                if (k1 != 3) { //加小单位
                    if (bn != 0) {
                        str = dw1[k1].concat(str);
                    }
                    k1++;
                } else { //不加小单位，加大单位
                    k1 = 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(1, str.length - 1);
                    str = dw2[k2].concat(str);
                    sum = 0;
                }
            }
            if (k1 == 3){ //小单位到千则大单位进一
                k2++;
            }
        }
        //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(1);
            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 = temp;
    }
    return value;
}

//resize的操作
(function(){
    var fn = function(){
        var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth
            ,r = 1255
            ,b = Element.extend(document.body)
            ,classname = b.className;
        if(w < r){
            //当窗体的宽度小于1255的时候执行相应的操作
        }else{
            //当窗体的宽度大于1255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();
})();

//实现base64解码
function base64_decode(data){
    var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
    var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = [];
    if (!data) { return data; }
    data += '';
    do {
        h1 = b64.indexOf(data.charAt(i++));
        h2 = b64.indexOf(data.charAt(i++));
        h3 = b64.indexOf(data.charAt(i++));
        h4 = b64.indexOf(data.charAt(i++));
        bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
        o1 = bits >> 16 & 0xff;
        o2 = bits >> 8 & 0xff;
        o3 = bits & 0xff;
        if (h3 == 64) {
            tmp_arr[ac++] = String.fromCharCode(o1);
        } else if (h4 == 64) {
            tmp_arr[ac++] = String.fromCharCode(o1, o2);
        } else {
            tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
        }
    } 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,c1 = 0,c2 = 0,c3 = 0;str_data += '';
    while (i < str_data.length) {
        c1 = str_data.charCodeAt(i);
        if (c1 < 128) {
            tmp_arr[ac++] = String.fromCharCode(c1);
            i++;
        } else if (c1 > 191 && c1 < 224) {
            c2 = str_data.charCodeAt(i + 1);
            tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
            i += 2;
        } else {
            c2 = str_data.charCodeAt(i + 1);
            c3 = str_data.charCodeAt(i + 2);
            tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
            i += 3;
        }
    }
    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.clientWidth==0 ?  db.clientWidth : de.clientWidth;
    var viewH=de.clientHeight==0 ?  db.clientHeight : de.clientHeight;
    return Array(viewW ,viewH);
}

//断鼠标是否移出事件
function isMouseOut(e, handler) {
    if (e.type !== 'mouseout') {
        return false;
    }
    var reltg = e.relatedTarget ? e.relatedTarget : e.type === 'mouseout' ? e.toElement : e.fromElement;
    while (reltg && reltg !== handler) {
        reltg = reltg.parentNode;
    }
    return (reltg !== handler);
}

//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 >= 33 && code <= 126){
            result += String.fromCharCode(str.charCodeAt(i) + 65248);
        }else if (code == 32){
            result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);
        }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 >= 65281 && code <= 65374){
            result += String.fromCharCode(str.charCodeAt(i) - 65248);
        }else if (code == 12288){
            result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);
        }else{
            result += str.charAt(i);
        }
    }
    return result;
}