javaScript 常用方法总结

经常使用的 JS 方法，今天记下，以便以后查询

/* 手机类型判断 */

var BrowserInfo = {    userAgent: navigator.userAgent.toLowerCase()    isAndroid: Boolean(navigator.userAgent.match(/android/ig)),    isIphone: Boolean(navigator.userAgent.match(/iphone|ipod/ig)),    isIpad: Boolean(navigator.userAgent.match(/ipad/ig)),    isWeixin: Boolean(navigator.userAgent.match(/MicroMessenger/ig)),}

/* 返回字符串长度，汉子计数为2 */

         function strLength(str) {             var a = 0;            for (var i = 0; i < str.length; i++) {                if (str.charCodeAt(i) > 255)                    a += 2;//按照预期计数增加2                else                    a++;            }            return a;        }

获取url中的参数

function GetQueryStringRegExp(name,url) {    var reg = new RegExp("(^|//?|&)" + name + "=([^&]*)(//s|&|$)", "i");    if (reg.test(url)) return decodeURIComponent(RegExp.$2.replace(//+/g, " ")); return "";}

　　/* js 绑定事件 适用于任何浏览器的元素绑定 */

function eventBind(obj, eventType, callBack) {        if (obj.addEventListener) {            obj.addEventListener(eventType, callBack, false);        }        else if (window.attachEvent) {            obj.attachEvent('on' + eventType, callBack);        }        else {            obj['on' + eventType] = callBack;        }    };eventBind(document, 'click', bodyClick);

/* 获得当前浏览器JS的版本 */

function getjsversion(){    var n = navigator;    var u = n.userAgent;    var apn = n.appName;    var v = n.appVersion;    var ie = v.indexOf('MSIE ');    if (ie > 0){        apv = parseInt(i = v.substring(ie + 5));        if (apv > 3) {            apv = parseFloat(i);        }    } else {        apv = parseFloat(v);    }    var isie = (apn == 'Microsoft Internet Explorer');    var ismac = (u.indexOf('Mac') >= 0);    var JavascriptVersion = "1.0";    if (String && String.PRototype) {        javascriptVersion = '1.1';        if (javascriptVersion.match) {            javascriptVersion = '1.2';            var tm = new Date;            if (tm.setUTCDate) {                javascriptVersion = '1.3';                if (isie && ismac && apv >= 5) javascriptVersion = '1.4';                var pn = 0;                if (pn.toPrecision) {                    javascriptVersion = '1.5';                    a = new Array;                    if (a.forEach) {                        javascriptVersion = '1.6';                        i = 0;                        o = new Object;                        tcf = new Function('o', 'var e,i=0;try{i=new Iterator(o)}catch(e){}return i');                        i = tcf(o);                        if (i && i.next) {                            javascriptVersion = '1.7';                        }                    }                }            }        }    }    return javascriptVersion;}

/* 获取当前点击事件的Object对象 */

function getEvent() {    if (document.all) {        return window.event; //如果是ie    }    func = getEvent.caller;    while (func != null) {        var arg0 = func.arguments[0];        if (arg0) {            if ((arg0.constructor == Event || arg0.constructor == MouseEvent)|| (typeof (arg0) == "object" && arg0.preventDefault && arg0.stopPropagation)) {                return arg0;            }        }        func = func.caller;    }    return null;};

/*字符串截取方法 */

getCharactersLen: function (charStr, cutCount) {        if (charStr == null || charStr == '') return '';        var totalCount = 0;        var newStr = '';        for (var i = 0; i < charStr.length; i++) {            var c = charStr.charCodeAt(i);            if (c < 255 && c > 0) {                totalCount++;            } else {                totalCount += 2;            }            if (totalCount >= cutCount) {                newStr += charStr.charAt(i);                break;            }            else {                newStr += charStr.charAt(i);            }        }        return newStr;    }

/* JS 弹出新窗口全屏 */

var tmp = window.open("about:blank", "", "fullscreen=1")                            tmp.moveTo(0, 0);                            tmp.resizeTo(screen.width + 20, screen.height);                            tmp.focus();                            tmp.location.href = 'http://www.che168.com/pinggu/eva_' + msgResult.message[0] + '.html';var config_ = "left=0,top=0,width=" + (window.screen.Width) + ",height=" + (window.screen.Height);                            window.open('http://www.che168.com/pinggu/eva_' + msgResult.message[0] + '.html', "winHanle", config_);//模拟form提交打开新页面var f = document.createElement("form");                            f.setAttribute('action', 'http://www.che168.com/pinggu/eva_' + msgResult.message[0] + '.html');                            f.target = '_blank';                            document.body.appendChild(f);                            f.submit();

/*全选/全不选 */

function selectAll(objSelect) {            if (objSelect.checked == true) {                $("input[name='chkId']").attr("checked", true);                $("input[name='chkAll']").attr("checked", true);            }            else if (objSelect.checked == false) {                $("input[name='chkId']").attr("checked", false);                $("input[name='chkAll']").attr("checked", false);            }        }

/* js 判断浏览器 */

判断是否是 IE 浏览器if (document.all){ alert(”IE浏览器”); }else{ alert(”非IE浏览器”); } if (!!window.ActiveXObject){ alert(”IE浏览器”); }else{ alert(”非IE浏览器”); } 判断是IE几var isIE=!!window.ActiveXObject; var isIE6=isIE&&!window.xmlHttpRequest; var isIE8=isIE&&!!document.documentMode; var isIE7=isIE&&!isIE6&&!isIE8; if (isIE){ if (isIE6){ alert(”ie6″); }else if (isIE8){ alert(”ie8″); }else if (isIE7){ alert(”ie7″); } } 

/* 判断浏览器 */

function getOs() {    if (navigator.userAgent.indexOf("MSIE 8.0") > 0) {        return "MSIE8";    }    else if (navigator.userAgent.indexOf("MSIE 6.0") > 0) {        return "MSIE6";    }    else if (navigator.userAgent.indexOf("MSIE 7.0") > 0) {        return "MSIE7";    }    else if (isFirefox = navigator.userAgent.indexOf("Firefox") > 0) {        return "Firefox";    }    if (navigator.userAgent.indexOf("Chrome") > 0) {        return "Chrome";    }    else {        return "Other";    }}

/* JS判断两个日期大小 适合 2012-09-09 与2012-9-9 两种格式的对比 */

//得到日期值并转化成日期格式，replace(//-/g, "//")是根据验证表达式把日期转化成长日期格式，这样再进行判断就好判断了        function ValidateDate() {            var beginDate = $("#t_datestart").val();            var endDate = $("#t_dateend").val();            if (beginDate.length > 0 && endDate.length>0) {                var sDate = new Date(beginDate.replace(//-/g, "//"));                var eDate= new Date(endDate.replace(//-/g, "//"));                if (sDate > eDate) {                    alert('开始日期要小于结束日期');                    return false;                }            }        }

/* 移除事件 */

            this.moveBind = function (objId, eventType, callBack) {                var obj = document.getElementById(objId);                if (obj.removeEventListener) {                    obj.removeEventListener(eventType,