JavaScript Helper

1、获取对象

function $f(objName) { if (document.getElementById) { return document.getElementById(objName); } else if (document.layers) { return eval("document.layers['" + objName + "']"); } else return eval('document.all.' + objName); }

2、COOKIE

function SetCookie(name, value, date) { var argv = SetCookie.arguments; var argc = SetCookie.arguments.length; var expires = (argc > 2) ? argv[2].toGMTString() : (new Date()).AddDays(1).toGMTString(); if (date) { expires = date; } var path = (argc > 3) ? argv[3] : "/"; var domain = (argc > 4) ? argv[4] : "sdo.com"; var secure = (argc > 5) ? argv[5] : false; var content = name + "=" + escape(value) + ";"; if (expires != null) { content += " expires=" + expires + ";"; } if (path != null) { content += " path=" + path + ";"; } if (domain != null) { content += " domain=" + domain + ";"; } document.cookie = content; }function GetCookie(cookieName) { var cookieString = document.cookie; var start = cookieString.indexOf(cookieName + '='); if (start == -1) return null; start += cookieName.length + 1; var end = cookieString.indexOf(';', start); if (end == -1) return unescape(cookieString.substring(start)); return unescape(cookieString.substring(start, end)); }function DeleteCookie(name) { SetCookie(name, ''); }

3、日期

(1)Date.prototype.AddDays = function(interval) { var dateObj = this; var millisecond = 1; var second = millisecond * 1000; var minute = second * 60; var hour = minute * 60; var day = hour * 24; var year = day * 365; var newDate; var dVal = new Date(dateObj); var dVal = dVal.valueOf(); newDate = new Date(dVal + day * interval); newDate = new Date(newDate); return newDate; }

(2)获取时间描述

    GetTimeDesc: function(seconds) {        var hours = 0;        var minutes = 0;        var second = parseInt(seconds);        if (second >= 3600) {            hours = Math.floor(second / 3600);            second -= hours * 3600;        }        if (second >= 60) {            minutes = Math.floor(second / 60);            second -= minutes * 60;        }        var ret = "";        if (hours > 0) { ret += hours + "小时"; }        if (minutes > 0) { ret += minutes + "分钟"; }        if (second > 0) { ret += second + "秒"; }        return ret;    }

4、格式化

(1)根据输入自动分隔内容并重新填充

    FormatCardNo: function(splitLength, splitChar, e) {        if (e.keyCode == 37 || e.keyCode == 39        || e.keyCode == 8 || e.keyCode == 46) {            return;        }        var str = $("#txtCardNo").val();        str = str.replace(/\s*/g, "");        str = str.replace("o", "0");        str = str.replace("i", "1");        var temp = Math.floor(str.length / splitLength);        var result = '';        for (var i = 0; i < temp * splitLength; i += splitLength) {            result += str.substring(i, i + splitLength) + splitChar;        }        var postfix = str.substring(str.length - str.length % splitLength, str.length);        result += postfix;        if (result.charAt(result.length - 1) == splitChar) {            result = result.substring(0, result.length - 1);        }        $("#txtCardNo").val(result);    },

5、四舍五入

    Round: function(num, n) {//12.125        var dd = 1;        var tempnum;        for (i = 0; i < n; i++) {            dd *= 10;        }        tempnum = num * dd;        tempnum = Math.round(tempnum);        return tempnum / dd;    }

6、遮罩

    ShowMask: function(url) {        window.parent.document.getElementById("divMask").style.height = window.parent.document.body.scrollHeight;        window.parent.document.getElementById("divMask").style.display = 'block';        window.parent.document.getElementById("divTip").style.display = 'block';        parent.document.getElementById("iframeTip").src = url;        window.top.scrollTo(0, 0);    }

7、StringBuilder

function StringBuilder(value) { this.strings = new Array(""); this.append(value); }StringBuilder.prototype.append = function(value) { if (value) this.strings.push(value); }StringBuilder.prototype.clear = function() { this.strings.length = 1; }StringBuilder.prototype.toString = function() { return this.strings.join(""); }

8、获取URL参数

function getUrlParam(name, parent) { var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i"); var r = window.location.search.substr(1).match(reg); if (r != null) return unescape(r[2]); else return null; }function getParentParam() { var r = window.frames.length; return r; }

9、自适应高度

var firstloadframe = 0var frameurl = "";function setAutoWH() {    try {        var name = "iframeTip";        var iframe = document.getElementById(name);        if (iframe.contentDocument) {            if (frameurl != iframe.contentDocument.location) {                firstloadframe = 0            }            if (firstloadframe == 0) {                iframe.height = iframe.contentDocument.body.scrollHeight; iframe.width = iframe.contentDocument.body.scrollWidth; $f("divTip").style.height = iframe.height + "px"; $f("divTip").style.width = iframe.width + "px"; $f("divMask").style.height = document.body.scrollHeight + "px";                firstloadframe = 1;                frameurl = iframe.contentDocument.location.href;            }        }        else { iframe.style.height = document.frames[name].document.body.scrollHeight; iframe.style.width = document.frames[name].document.body.scrollWidth; $f("divTip").style.height = iframe.style.height; $f("divTip").style.width = iframe.style.width; }    } catch (e) { }}function setAutoHeight(name) {    if (!name) name = "MainFrmTd";    iframe = document.getElementById(name);    try {        if (iframe.contentDocument) {            var h1 = 0, h2 = 0, d = iframe.contentDocument, dd = d.documentElement;            iframe.style.height = "10px";            if (dd && dd.scrollHeight) {                h1 = dd.scrollHeight;            }            if (d.body) {                h2 = d.body.scrollHeight;            }            var h = Math.max(h1, h2);            if (document.all) {                h += 4;            }            if (window.opera) {                h += 1;            }            iframe.style.height = h + 4 + "px";        }        else {            iframe.style.height = (document.frames[name].document.body.scrollHeight + 4) + "px";        }    }    catch (e) {        //alert(e.message)    }}