常用js函數

 //全局事件
 var _ua = navigator.userAgent.toLowerCase();
  //當前環境
  var env = (function(){
      return !/mobile|android/.test(_ua)?"pc":_ua.indexOf("micromessenger")>-1?"weixin":/qq\/([\d\.]+)*/.test(_ua)||/qzone\//.test(_ua)?"qq":/jzyc\/\d\.\d/.test(_ua)?"jzyc":"mobile";
  })();
//數組去重 
function arrayUniq(array) {
    return Array.prototype.filter.call(array, function(item, idx){ return item && array.indexOf(item) == idx; });
}
function arrayUniq(arr){
    var returnArr=[];
    for (var i=0,len=arr.length;i<len;i++){
        ((","+returnArr+",").indexOf(","+arr[i]+",")<0)?returnArr.push(arr[i]):'';
    };
    return returnArr;   
}

//去重合並數組
function mergeArray(a, b) {
  for (var i = 0; i < b.length; i++) {
    (("," + a + ",").indexOf("," + b[i] + ",") < 0) && a.push(b[i]);
  }
  return a;
}

//字符串長度
function strLenGB(str){
    var realLen = str.length;
    for (var i = 0; i <str.length; i++) {
        if(str.charCodeAt(i) > 255) realLen++ ;
    }
    return realLen;
}
function strLenGB(str){
    return str.replace(/[\u00FF-\uFFFF]/g,"  ").length;
}

//進行字符長度驗證，如果超過長度則返回截斷後的字符串
function strSubGB(str,start,len,flag){
    var total = strLenGB(str);
    if(total > (len-start)){
        var flag=flag||"";
        var strTemp=str.replace(/[\u00FF-\uFFFF]/g, "@-").substr(start,len);
        var subLen =strTemp.match(/@-/g)?strTemp.match(/@-/g).length:0;
        return str.substring(0,len-subLen)+flag;
    }
    return str;
}
//獲取url參數  
function getQuery(name, url) {
    var u = arguments[1] || window.location.search,
        reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)"),
        r = u.substr(u.indexOf("\?") + 1).match(reg);
    return r != null ? r[2] : "";
}

//添加url參數
function setQuery(json, url){
    var hash = url ? url.match(/#.*/)&&url.match(/#.*/)[0]||"" : location.hash,
        search = url ? url.replace(/#.*/,"").match(/\?.*/)&&url.replace(/#.*/,"").match(/\?.*/)[0]||"" : location.search,
        path = url ? url.replace(/#.*/,"").replace(/\?.*/,"") : location.protocol+"//"+location.host+location.pathname;
    for(var i in json){
        var query = i+"="+json[i],
            oldValue = getQuery(i, search);
        if(oldValue){
            search = search.replace(i+"="+oldValue,i+"="+json[i]);
        }else{
            search = (search.length>0)?search +"&"+ query:"?"+query;
        }
    }
    return path+search+hash;
}



 //獲取指定hash值 #key=xx
function getHash(name) {
    var u = arguments[1] || location.hash;
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
    var r = u.substr(u.indexOf("#") + 1).match(reg);
    if (r != null) {
        return r[2];
    }
    return "";
}

function htmlDecode(str){
    return typeof(str) != "string" ? "" : str.replace(/&lt;/g, "<").replace(/&gt;/g, ">").replace(/&quot;/g, "\"").replace(/&nbsp;/g, " ").replace(/&#39;/g,"'").replace(/&amp;/g, "&");
}

function htmlEncode(str){
    return typeof(str) != "string" ? "" : str.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/\"/g, "&quot;").replace(/\'/g, "&apos;").replace(/ /g, "&nbsp;");
}
// 清除緩存記錄
function removeStorage(key) {
    window.localStorage.removeItem(key);
}
/**
 * 保存本地緩存信息
 * @param key       保存的key
 * @param value     需要保存的值
 * @param isJson    是否是json格式數據
 */
function saveStorage(key, value, isJson) {
    window.localStorage.setItem(key, isJson ? JSON.stringify(value) : value);
}
/**
 * 通過key獲取對應的值
 * @param key
 * @return {*}
 */
function getStorage(key) {
    return window.localStorage.getItem(key);
}
// 判斷是否支持本地緩存
function isSupportStorage() {
    if (!window.localStorage) {
        return false;
    }
    //safari的隱私模式不支持緩存
    try {
        window.localStorage.setItem("test", true);
        window.localStorage.removeItem("test");
        return true;
    } catch(e) {
        return false;
    }
}
function isDate(d) {
    try {
        var d = new Date(d);
        d = null;
        return true;
    } catch (e) {
        return false;
    }
}

function format(s) {
    var re = /{\d+}/g,
        args = Array.prototype.slice.call(arguments, 1),
        r = s.toString();
    return r.replace(re, function(v) {
        var vi = v.substr(1, v.length - 2);
        return typeof args[vi] === 'undefined' ? v : args[vi];
    });
}
//讀取cookie
function getCookie(name) {
    var reg = new RegExp("(^| )" + name + "(?:=([^;]*))?(;|$)"), val = document.cookie.match(reg);
    return val ? (val[2] ? unescape(val[2]).replace(/(^")|("$)/g,"") : "") : null;
}
//寫入cookie
function setCookie(name, value, expires, path, domain, secure) {
    var exp = new Date(), expires = arguments[2] || null, path = arguments[3] || "/", domain = arguments[4] || null, secure = arguments[5] || false;
    expires ? exp.setMinutes(exp.getMinutes() + parseInt(expires)) : "";
    document.cookie = name + '=' + escape(value) + ( expires ? ';expires=' + exp.toGMTString() : '') + ( path ? ';path=' + path : '') + ( domain ? ';domain=' + domain : '') + ( secure ? ';secure' : '');
}
//交換賦值
//獲取服務器時間
 var getServerTime = function(url) {
     var xhr = $xhrMaker(),
     var url = url || location.protocol+"//" + window.location.hostname+"/favicon.ico";
     try{
         xhr.open("HEAD", url, false);
         xhr.send();
     }catch(e){
       return new Date();
     }
     return new Date(xhr.getResponseHeader("Date"));

     function $xhrMaker(){
         var xhr;
         try{// Firefox, Opera 8.0+, Safari
           xhr=new XMLHttpRequest();
         }catch(e){//Internet Explorer
           try{
             xhr=new ActiveXObject("Msxml2.XMLHTTP");
           }catch(e){
             try {
               xhr=new ActiveXObject("Microsoft.XMLHTTP");
             }catch (e){
               xhr=null;
             }
           }
         };
         return xhr;
     }
 }

//日期格式
  var format = function(date,formatStr){
       var arrWeek=['日','一','二','三','四','五','六'];
       var str=formatStr
         .replace(/yyyy/i,date.getFullYear())
         .replace(/yy/i,$addZero(date.getFullYear() % 100,2) )
         .replace(/mm/i,$addZero(date.getMonth()+1,2))
         .replace(/m/ig,date.getMonth()+1)
         .replace(/dd/i,$addZero(date.getDate(),2) )
         .replace(/d/ig,date.getDate())
         .replace(/hh/i,$addZero(date.getHours(),2))
         .replace(/h/ig,date.getHours())
         .replace(/ii/i,$addZero(date.getMinutes(),2))
         .replace(/i/ig,date.getMinutes())
         .replace(/ss/i,$addZero(date.getSeconds(),2))
         .replace(/s/ig,date.getSeconds())
         .replace(/w/ig,date.getDay())
         .replace(/W/g,arrWeek[date.getDay()]); 
       return str;

       function $addZero(v,size){
           for(var i=0,len=size-(v+"").length;i<len;i++){
               v="0"+v;
           };
           return v+"";
       }

   }

//時間間隔差 類似倒計時
var getTimeDistance = function (ts){
    var timeLeft = [0,0,0,0];
    timeLeft[0] = (ts>86400) ? parseInt(ts/86400):0;
    ts = ts - timeLeft[0] * 86400;
    timeLeft[1] = (ts>3600)?parseInt(ts/3600):0;
    ts = ts - timeLeft[1] * 3600;
    timeLeft[2] = (ts>60)?parseInt(ts/60):0;
    timeLeft[3] = ts - timeLeft[2] * 60;
    return timeLeft;
}


var getTimeInterval = function (st,et){
    var timeLeft=[0,0,0,0];
    var timeStr="";
    var ts=(et>st)?parseInt((et-st)/1000):0;
    timeLeft[0]=(ts>86400)?parseInt(ts/86400):0;
    ts=ts - timeLeft[0] * 86400;
    timeLeft[1]=(ts>3600)?parseInt(ts/3600):0;
    ts=ts - timeLeft[1] * 3600;
    timeLeft[2]=(ts>60)?parseInt(ts/60):0;
    timeLeft[3]=ts - timeLeft[2] * 60;
    timeStr=(timeLeft[0]>0)?timeLeft[0]+"天":"";
    timeStr+=(timeLeft[0]<=0 && timeLeft[1]<=0)?"":(timeLeft[1]+"小時");
    timeStr+=(timeLeft[0]<=0 && timeLeft[1]<=0 && timeLeft[2]<=0)?"":(timeLeft[2]+"分鐘");
    timeStr+=(timeLeft[0]<=0 && timeLeft[1]<=0 && timeLeft[2]<=0 && timeLeft[3]<=0)?"":timeLeft[3]+"秒";
    return timeStr;
}

//合併對象
function mergeObject(a,b){
    for(var prop in b){
        if(!b.hasOwnProperty(prop)){
            return;
        }
        if(!a[prop]){
            a[prop] = b[prop];
        }else if(Object.prototype.toString.call(b[prop] == "[object object]")){
            mergeObject(a[prop],b[prop]);
        }else{
            a[prop] = b[prop];
        }
    }
    return a;
}

 //對象類型判斷 isType("String", obj)
 function isType(type, obj) {
   return Object.prototype.toString.call(obj) === "[object " + type + "]"
 }


//js 字符串截取空白的trim的原型方法
   String.prototype.trim = function(){
        return this.replace(/(^\s*)|(\s*$)/g,'');
  }
//滑動  
var _topTimer = null;  
window.goTop = function(top ,acceleration, time) {  
    if(_topTimer)clearTimeout(_topTimer);  
    top = Math.floor(top);  
    acceleration = acceleration || 0.1;  
    time = time || 16;  
    var y1 = 0;  
    var y2 = 0;  
    var y3 = 0;  
    if (document.documentElement) {  
        y1 = document.documentElement.scrollTop || 0;  
    }  
    if (document.body) {  
        y2 = document.body.scrollTop || 0;  
    }  
    var y3 = window.scrollY || 0;  
    // 滾動條到頁面頂部的垂直距離  
    var y = Math.max(y1, Math.max(y2, y3));  
    console.log("top:" + y);  
    // 滾動距離 = 目前距離 / 速度, 因爲距離原來越小, 速度是大於 1 的數, 所以滾動距離會越來越小  
    var speed = 1 + acceleration;  
    window.scrollTo(0, top - y > 0 ? ((top + (1 / acceleration) - y) * (speed - 1) + y) : (top + (y - top) / speed));  
    // 如果距離不爲零, 繼續調用迭代本函數  
    if (y < $("body").height() - $(window).height() && (top - y > 0) || (top - y < 0 && y - top > 0)) {  
        _topTimer = setTimeout(function(){  
            goTop(top,acceleration,time);  
        }, time);  
    }  
}  
function $shuffle(arr) {  
    var array = arr.concat();  
    for(var j, x, i = array.length; i; j = parseInt(Math.random() * i), x = array[--i], array[i] = array[j], array[j] = x);   
    return array;  
}  
//發送請求
function sendJs(url,opt) {
    var option={
        onLoad:null,//成功時回調函數
        onError:null,//加載錯誤時回調函數
        onTimeout:null,//超時時回調函數
        timeout:8000,//超時時間
        charset:"utf-8"//默認字符集
    };
    if(arguments.length==1){
        if(typeof arguments[0]=="object"){//只有一個參數，且參數爲json對象的情況
            opt=arguments[0];
            url=opt.url;
        }else{//只有一個參數，且參數字符串(url地址)的情況
            opt={};
        }
    }
    /*增加鍵值對data參數支持*/
    if(typeof(opt.data)=='object'){
        var param=[];
        for(var k in opt.data){param.push(k+'='+opt.data[k])}
        if(param.length>0){
            param=param.join('&');
            url+=(url.indexOf('?')>0?'&':'?')+param;
        }
    }
    /*增加鍵值對data參數支持*/
    for(var i in opt){
        if(opt.hasOwnProperty(i)){
            option[i]=opt[i];
        }
    }
    var el=document.createElement("script");
    el.charset=option.charset||"utf-8";
    el.onload = el.onreadystatechange = function() {            
        if(/loaded|complete/i.test(this.readyState) || navigator.userAgent.toLowerCase().indexOf("msie") == -1) {
            option.onLoad&&option.onLoad();//加載成功之後的回調
            clear();
        }
    };
    el.onerror = function(){
        option.onError&&option.onError();//加載錯誤時的回調
        clear();
    };
    el.src = url;
    document.getElementsByTagName('head')[0].appendChild(el);
    if (typeof option.onTimeout=="function") {
        setTimeout(function(){
            option.onTimeout();
        },option.timeout);
    };

    var clear = function(){
        if(!el){return ;}
        el.onload = el.onreadystatechange = el.onerror = null;
        el.parentNode&&(el.parentNode.removeChild(el));
        el = null;
    }
};  

//讀取COOKIE  
function $getCookie(name) {  
    var reg = new RegExp("(^| )" + name + "(?:=([^;]*))?(;|$)"), val = document.cookie.match(reg);  
    return val ? (val[2] ? unescape(val[2]) : "") : null;  
}  

 //刪除cookie  
function $delCookie(name, path, domain, secure) {  
    var value = $getCookie(name);  
    if(value != null) {  
        var exp = new Date();  
        exp.setMinutes(exp.getMinutes() - 1000);  
        path = path || "/";  
        document.cookie = name + '=;expires=' + exp.toGMTString() + ( path ? ';path=' + path : '') + ( domain ? ';domain=' + domain : '') + ( secure ? ';secure' : '');  
    }  
}  

//寫入COOKIES
function $setCookie(name, value, expires, path, domain, secure) {  
    var exp = new Date(), expires = arguments[2] || null, path = arguments[3] || "/", domain = arguments[4] || null, secure = arguments[5] || false;  
    expires ? exp.setMinutes(exp.getMinutes() + parseInt(expires)) : "";  
    document.cookie = name + '=' + escape(value) + ( expires ? ';expires=' + exp.toGMTString() : '') + ( path ? ';path=' + path : '') + ( domain ? ';domain=' + domain : '') + ( secure ? ';secure' : '');  
} 


function $xss(str,type){  
    //空過濾  
    if(!str){  
        return str===0 ? "0" : "";  
    }  

    switch(type){  
        case "none": //過度方案  
            return str+"";  
        break;  
        case "html": //過濾html字符串中的XSS  
            return str.replace(/[&'"<>\/\\\-\x00-\x09\x0b-\x0c\x1f\x80-\xff]/g, function(r){  
                return "&#" + r.charCodeAt(0) + ";"  
            }).replace(/ /g, " ").replace(/\r\n/g, "<br />").replace(/\n/g,"<br />").replace(/\r/g,"<br />");  
        break;  
        case "htmlEp": //過濾DOM節點屬性中的XSS  
            return str.replace(/[&'"<>\/\\\-\x00-\x1f\x80-\xff]/g, function(r){  
                return "&#" + r.charCodeAt(0) + ";"  
            });  
        break;  
        case "url": //過濾url  
            return escape(str).replace(/\+/g, "%2B");  
        break;  
        case "miniUrl":  
            return str.replace(/%/g, "%25");  
        break;  
        case "script":  
            return str.replace(/[\\"']/g, function(r){  
                return "\\" + r;  
            }).replace(/%/g, "\\x25").replace(/\n/g, "\\n").replace(/\r/g, "\\r").replace(/\x01/g, "\\x01");  
        break;  
        case "reg":  
            return str.replace(/[\\\^\$\*\+\?\{\}\.\(\)\[\]]/g, function(a){  
                return "\\" + a;  
            });  
        break;  
        default:  
            return escape(str).replace(/[&'"<>\/\\\-\x00-\x09\x0b-\x0c\x1f\x80-\xff]/g, function(r){  
                return "&#" + r.charCodeAt(0) + ";"  
            }).replace(/ /g, " ").replace(/\r\n/g, "<br />").replace(/\n/g,"<br />").replace(/\r/g,"<br />");  
        break;  
    }  
}  

function $md5(){  
    // md5加密  
    var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */  
    var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */  
    var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */  
    var option={};  
    option.hexcase=hexcase;  
    option.b64pad=b64pad;  
    option.chrsz=chrsz;  
    option.hex_md5=hex_md5;  
    option.binl2hex=binl2hex;  
    option.core_md5=core_md5;  

    return option;  
    function hex_md5(s){   
        return binl2hex(core_md5(str2binl(s), s.length * option.chrsz));  
    }  
    function binl2hex(binarray){  
        var hex_tab = option.hexcase ? "0123456789ABCDEF" : "0123456789abcdef";  
        var str = "";  
        for(var i = 0; i < binarray.length * 4; i++)  
        {  
          str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +  
                 hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);  
        }  
        return str;  
    }  
    function core_md5(x, len){  
        /* append padding */  
        x[len >> 5] |= 0x80 << ((len) % 32);  
        x[(((len + 64) >>> 9) << 4) + 14] = len;  

        var a =  1732584193;  
        var b = -271733879;  
        var c = -1732584194;  
        var d =  271733878;  

        for(var i = 0; i < x.length; i += 16){  
            var olda = a;  
            var oldb = b;  
            var oldc = c;  
            var oldd = d;  

            a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);  
            d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);  
            c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);  
            b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);  
            a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);  
            d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);  
            c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);  
            b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);  
            a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);  
            d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);  
            c = md5_ff(c, d, a, b, x[i+10], 17, -42063);  
            b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);  
            a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);  
            d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);  
            c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);  
            b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);  

            a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);  
            d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);  
            c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);  
            b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);  
            a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);  
            d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);  
            c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);  
            b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);  
            a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);  
            d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);  
            c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);  
            b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);  
            a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);  
            d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);  
            c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);  
            b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);  

            a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);  
            d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);  
            c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);  
            b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);  
            a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);  
            d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);  
            c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);  
            b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);  
            a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);  
            d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);  
            c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);  
            b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);  
            a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);  
            d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);  
            c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);  
            b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);  

            a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);  
            d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);  
            c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);  
            b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);  
            a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);  
            d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);  
            c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);  
            b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);  
            a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);  
            d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);  
            c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);  
            b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);  
            a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);  
            d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);  
            c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);  
            b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);  

            a = safe_add(a, olda);  
            b = safe_add(b, oldb);  
            c = safe_add(c, oldc);  
            d = safe_add(d, oldd);  
        }  
        return Array(a, b, c, d);  
    }  

    function md5_cmn(q, a, b, x, s, t){  
        return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);  
    }  
    function md5_ff(a, b, c, d, x, s, t){  
        return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);  
    }  
    function md5_gg(a, b, c, d, x, s, t){  
        return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);  
    }  
    function md5_hh(a, b, c, d, x, s, t){  
        return md5_cmn(b ^ c ^ d, a, b, x, s, t);  
    }  
    function md5_ii(a, b, c, d, x, s, t){  
        return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);  
    }  

    function safe_add(x, y){  
        var lsw = (x & 0xFFFF) + (y & 0xFFFF);  
        var msw = (x >> 16) + (y >> 16) + (lsw >> 16);  
        return (msw << 16) | (lsw & 0xFFFF);  
    }  
    function bit_rol(num, cnt){  
        return (num << cnt) | (num >>> (32 - cnt));  
    }  

    function str2binl(str){  
        var bin = Array();  
        var mask = (1 << option.chrsz) - 1;  
        for(var i = 0; i < str.length * option.chrsz; i += option.chrsz)  
          bin[i>>5] |= (str.charCodeAt(i / option.chrsz) & mask) << (i%32);  
        return bin;  
    }  
}  
//var m=$md5();  
//var code=m.hex_md5('abc');  

function $extend(){  
    // copy reference to target object  
    var target = arguments[0] || {}, i = 1, length = arguments.length, options;  
    // Handle case when target is a string or something (possible in deep copy)  
    if ( typeof target != "object" && typeof target != "function" )  
        target = {};  
    for ( ; i < length; i++ )  
        // Only deal with non-null/undefined values  
        if ( (options = arguments[ i ]) != null )  
            // Extend the base object  
            for ( var name in options ) {  
                var copy = options[ name ];  
                // Prevent never-ending loop  
                if ( target === copy )  
                    continue;  
                if ( copy !== undefined )  
                    target[ name ] = copy;  
            }  
    // Return the modified object  
    return target;  
}