启点main.js工具函数库解析：字符串处理与DOM操作

字符串处理与格式化工具

String.prototype.trim = function() {

return this.replace(/(^\s*)|(\s*$)/g, "");

String.prototype.len=function() {

return this.replace(/[^\x00-\xff]/g,'aa').length;

function StringBuilder(value) {

this.strings = new Array("");

this.append(value);

// Appends the given value to the end of this instance.

StringBuilder.prototype.append = function (value) {

if (value) {

this.strings.push(value);

// Clears the string buffer

StringBuilder.prototype.clear = function () {

this.strings.length = 1;

// Converts this instance to a String.

StringBuilder.prototype.toString = function () {

return this.strings.join("");

//string format prototype

// sample: var test="my name is {0} {2} " ;

// alert(test.format('liang','zhonghua');

if (!String._FORMAT_SEPARATOR){

String._FORMAT_SEPARATOR = String.fromCharCode(0x1f);

String._FORMAT_ARGS_PATTERN = new RegExp('^[^' + String._FORMAT_SEPARATOR + ']*'

+ new Array(100).join('(?:.([^' + String._FORMAT_SEPARATOR + ']*))?'));

if (!String.format)

String.format = function (s){

return Array.prototype.join.call(arguments, String._FORMAT_SEPARATOR).

replace(String._FORMAT_ARGS_PATTERN, s);

if (!''.format)

String.prototype.format = function (){

return (String._FORMAT_SEPARATOR +

Array.prototype.join.call(arguments, String._FORMAT_SEPARATOR)).

replace(String._FORMAT_ARGS_PATTERN, this);

//end string format

Cookie读写与登录状态检查

function checkLoginByCookie() {

var cookieId="AUTHTEST";

if(window.location.href.toLowerCase().indexOf("qidian.com") > -1)

cookieId="cmfuToken";

if((GetCookie(cookieId)!=null && GetCookie(cookieId).length > 0 ))

return true;

else

if(GetCookie('cmfu_al') != null && GetCookie('cmfu_al').length > 0)

return true;

return false;

URL参数解析与DOM选择器封装

function getUrlParam(name) {

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 $(objName) {

if(document.getElementById)

return document.getElementById(objName );

else if(document.layers)

return eval("document.layers['" + objName +"']");

else

return eval('document.all.' + objName);

日期计算与浏览器兼容性处理

function DateAdd(BaseDate, interval, DatePart) {

var dateObj = new Date(BaseDate.replace("-",","));

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();

switch(DatePart) {

case "ms": newDate=new Date(dVal+millisecond*interval); break;

case "s": newDate=new Date(dVal+second*interval); break;

case "mi": newDate=new Date(dVal+minute*interval); break;

case "h": newDate=new Date(dVal+hour*interval); break;

case "d": newDate=new Date(dVal+day*interval); break;

case "y": newDate=new Date(dVal+year*interval); break;

default: return escape("日期格式不对");

newDate = new Date(newDate);

return newDate.getFullYear() + "-" + (newDate.getMonth() + 1) + "-" + newDate.getDate() ;

//增加当前日期的天数

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

function SetCookie(name, value) {

var argv = SetCookie.arguments;

var argc = SetCookie.arguments.length;

var expires = (argc > 2) ? argv[2].toGMTString() : (new Date()).AddDays(30).toGMTString();;

var path = (argc > 3) ? argv[3] : "/";

var domain = (argc > 4) ? argv[4] : null;

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 + '=');

// 加上等号的原因是避免在某些 Cookie 的值里有

// 与 cookieName 一样的字符串。

if (start == -1) // 找不到

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));

表单交互与弹窗控制逻辑

/*文本框得到焦点*/

function TextBoxOnFocus(txtControl,strDefaultText) {

if (txtControl.value==strDefaultText)

txtControl.value="";

/*文本框失去焦点*/

function TextBoxOnBlur(txtControl,strDefaultText) {

if (txtControl.value.replace(/(^[\s]*)|([\s]*$)/g,"")=="")

txtControl.value=strDefaultText;

/*功能：弹出群发消息窗口*/

function MultiSendWin(subject,content) {

var win =window.open(uploadURL+"?subject=" + subject + "&content=" +content,"","menubar=no,width=480,height=550,resizeable=no","");

return false;

/*功能：弹出留言窗口

function SpaceSendMsg(toUserId) {

var win =window.open(spaceSendMsgURL+"?toUserId=" + toUserId,"","menubar=no,width=500,height=400,resizeable=no","");

return false;

function ShowServerMessage(result) {

eval(result.value);

//回车提交表单

function KeydownSubmitForm(btnId) {

var btn=document.getElementById(btnId);

if (btn!=null&& event.keyCode== 13)

event.returnValue=false;

event.keyCode=9;

btn.click();

//ReadChapter -抵用券js

function MDown(Object){

Obj=Object.id

document.all(Obj).setCapture()

pX=event.x-document.all(Obj).style.pixelLeft;

pY=event.y-document.all(Obj).style.pixelTop;

function MMove(){

if(Obj!=''){

document.all(Obj).style.left=event.x-pX;

document.all(Obj).style.top=event.y-pY;

function MUp(){

if(Obj!=''){

document.all(Obj).releaseCapture();

Obj='';

//关闭抵用券信息

function LayerClose(divDiscount) {

document.getElementById(divDiscount).style.visibility="hidden";

//显示抵用券信息

function LayerShow(divDiscount,discountPrize) {

var prizeUI = document.getElementById(divDiscount);

prizeUI.style.left = screen.width-530;

prizeUI.style.top = screen.Height - 480;

prizeUI.style.visibility="visible";

document.getElementById("lblPrize1").innerHTML=discountPrize;

document.getElementById("lblPrize2").innerHTML=discountPrize;

window.setInterval("LayerClose('" + divDiscount + "')",15000);

//帮助masterpage用

function HideMenu(menuid) {

var obj = document.getElementById(menuid);

if(obj.style.display == "none")

obj.style.display = "";

else

obj.style.display = "none";

if(obj.style.display == "")

var tmpId = "M0";

for(var i = 1 ; i <= 9; i++)

var myid = tmpId + i;

if(myid != menuid)

document.getElementById(myid).style.display = "none";

登录弹窗与滚动定位实现

/* div login */

function ShowLoginDiv() {

var builder = new StringBuilder();

builder.append("<table border='0' cellpadding='0' cellspacing='0'>");

builder.append("<tr class='TitleTR'>");

builder.append("<td align='left'>");

builder.append("登录");

builder.append("</td>");

builder.append("<td align='right'>");

builder.append("<span title='关闭' onclick='HideLoginMask();'>×</span>");

builder.append("</td>");

builder.append("</tr>");

builder.append("<tr>");

builder.append("<td colspan='2'>");

builder.append("<iframe src='/DivUserLogin.aspx' width='225px' height='125px' name='loginFrame' ");//src=''"

builder.append("id='loginFrame' frameborder='0' scrolling='no'></iframe>");

builder.append("</td>");

builder.append("</tr>");

builder.append("</table>");

//window.top.scrollTo(0,0);

document.getElementById("DivMask").style.height=document.body.scrollHeight;

document.getElementById("DivMask").style.width=document.body.scrollWidth;

document.getElementById("DivMask").style.display = 'block';

document.getElementById("DivLogin").style.display = "block";

document.getElementById("DivLogin").innerHTML = builder.toString();

ScrollDiv();

window.onscroll=ScrollDiv;

window.onresize=ScrollDiv;

window.onload=ScrollDiv;

function HideLoginMask() {

document.getElementById("DivMask").style.display="none";

document.getElementById("DivLogin").style.display="none";

/*随屏幕滚动*/

function ScrollDiv() {

if($("DivLogin"))

document.getElementById("DivLogin").style.top=(document.body.scrollTop+

(document.body.clientHeight-document.getElementById("DivLogin").offsetHeight)/2)+"px";

document.getElementById("DivLogin").style.left=(document.documentElement.scrollLeft+

(document.body.clientWidth-document.getElementById("DivLogin").offsetWidth)/2)+"px";

if($("AddMark"))

// if(!event )

// return;

$("AddMark").style.top=document.body.clientHeight + document.body.scrollTop-200

$("AddMark").style.left=document.body.clientWidth-56;

$("AddMark").style.display='';

// (document.body.clientHeight-$("AddMark").offsetHeight)/2)+"px";

if($("MonthVoteTip"))

//$("MonthVoteTip").style.top=document.body.scrollTop+document.body.clientHeight-$("MonthVoteTip").offsetHeight+"px";

$("MonthVoteTip").style.top = getPosition($("AddMark")).y - $("AddMark").offsetHeight + "px";

function AutoScroll() {

window.onscroll=ScrollDiv;

window.onresize=ScrollDiv;

window.onload=ScrollDiv;

function getPosition(el) {

for (var lx=0,ly=0;el!=null;lx+=el.offsetLeft,ly+=el.offsetTop,el=el.offsetParent);

return {x:lx,y:ly}

字符串截取与收藏功能封装

/* 2007-11-28 XuJian */

//截取字符串 包含中文处理

//(串,长度,增加...)

function subString(str, len, hasDot) {

var newLength = 0;

var newStr = "";

var chineseRegex = /[^\x00-\xff]/g;

var singleChar = "";

var strLength = str.replace(chineseRegex,"**").length;

for(var i = 0;i < strLength;i++)

singleChar = str.charAt(i).toString();

if(singleChar.match(chineseRegex) != null)

newLength += 2;

else

newLength++;

if(newLength > len)

break;

newStr += singleChar;

if(hasDot && strLength > len)

newStr += "...";

return newStr;

/* 2007-10-26 14:20 Get String Lenth(include chinese character) */

function GetStringLength(strObj) {

return strObj.replace(/[^\x00-\xff]/g,"**").length;

function addMark(title,url) {

try{

if (window.sidebar) {

window.sidebar.addPanel(title, url,"");

} else if( document.all ) {

window.external.AddFavorite( url, title);

} else if( window.opera && window.print ) {

return true;

}catch(e)

alert("您的浏览器安全设置不允许该项操作")