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js 代码集(学习js的朋友可以看下)_javascript技巧

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/**
* @author Super Sha
* QQ:770104121
* E-Mail:supei_shafeng@163.com
* publish date: 2009-3-27
* All Rights Reserved
*/

var JsHelper={}; //声明一个JsHelper根命名空间
JsHelper.DOM = {}; //声明JsHelper目录下的DOM命名空间
JsHelper.Event={}; //声明JsHelper目录下的Event事件命名空间
JsHelper.Browser={}; //声明JsHelper目录下的跟浏览器相关的函数Browser命名空间
JsHelper.Ajax={}; //声明Jshelper目录下的跟Ajax相关的函数命名空间
JsHelper.String={}; //声明JsHelper目录下的跟String相关的命名空间

/*
* $() 可以输入多个参数,将返回一个获取对象的数组
*/
var $=function(){ //简化版的$方法
var elements=new Array();
if(arguments.length==0){ //如果参数为空,则返回document元素
return document;
}
for (var i = 0; i {
var element = arguments[i];
if (typeof element == string )
{
element = document.getElementById(element);
}
if (arguments.length == 1)
{
return element;
}
elements.push(element);
}
return elements;
}
JsHelper.DOM.$=function()
{
var elements=new Array();
for (var i = 0; i {
var element = arguments[i];
if (typeof element == string )
{
element = document.getElementById(element);
}
if (arguments.length == 1)
{
return element;
}
elements.push(element);
}
return elements;
}
/*
* $Value() 可以输入多个参数,将返回一个获取对象的Value数组
*/
JsHelper.DOM.value=function()
{
var values=new Array();
for (var i = 0; i {
var element = arguments[i];
if (typeof(element) == string )
{
var v=document.getElementById(element).value;
}
if(arguments.length==1)
{
return v;
}
values.push(v);
}
return values;
}
/*
makeArray对输入的参数生成数组返回,如果参数为空,则返回 "undefined",否则返回数组
*/
JsHelper.String.makeArray=function()
{
var values=new Array();
if(arguments.length>0){
for (var i = 0; i {
var element=arguments[i];
if(typeof element == "string")
{
values.push(element);
}
}
}
else
{
return "undefined";
}
return values;
}
/*
* 声明一个StringBuilder类,处理连接字符串性能的问题
*/
JsHelper.String.StringBulider={
_strs:new Array(),
append: function(str){ //给属性_strs添加字符串
this._strs.push(str);
return this;
},
toString:function(){
if (arguments.length != 0) {
return this._strs.join(arguments[0]); //返回属性_strs结合后的字符串,接受一个可选的参数用于join的参数
}else{
return this._strs.join("");
}
}
};

/*
* $TagName()输入一个参数,将返回一个获取Elements TagNeme对象的数组
*/
JsHelper.DOM.tagName=function()
{
var element=arguments[0];
if(typeof element== string )
{
var tagname=document.getElementsByTagName(element);
}
return tagname;
}

//============================================================
/*
* label:HTML Label ID
* 只能适用与responseText
* 只能适用与GET方式
*/
var _xmlhttp;//声明全局XMLHttpRequest对象实例
function Ajax(method, url, label){
this.method = method;
this.url = url;
try {
_xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
try {
_xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (s) {
_xmlhttp = new XMLHttpRequest();
}
}
Ajax.prototype.ResponseText = function(){
_xmlhttp.onreadystatechange = this.onComplete;
_xmlhttp.open(this.method, this.url, true)
_xmlhttp.send(null);
}
Ajax.prototype.onComplete = function(){
if (_xmlhttp.readyState == 4) {
if (_xmlhttp.status == 200) {
$(label).innerHTML = _xmlhttp.responseText;
}
}
}
this.ResponseText();
}
//================================================

/*
* 判断浏览器类型
*/
var ua = navigator.userAgent.toLowerCase();
if (window.ActiveXObject) {
JsHelper.Browser.IE = ua.match(/msie ([\d.]+)/)[1];
}
else if (document.getBoxObjectFor) {
JsHelper.Browser.Firefox = ua.match(/firefox\/([\d.]+)/)[1];
}
else if (window.MessageEvent && !document.getBoxObjectFor) {
JsHelper.Browser.Chrome = ua.match(/chrome\/([\d.]+)/)[1];
}
else if (window.opera) {
JsHelper.Browser.Opera = ua.match(/opera.([\d.]+)/)[1];
}
else if (window.openDatabase) {
JsHelper.Browser.Safari = ua.match(/version\/([\d.]+)/)[1];
}
/*
* 声明一个XMLHttpRequest对象的实例,返回实例
*/
JsHelper.Ajax.createRequest=function()
{
var xmlhttp=null;
try
{
xmlhttp=new XMLHttpRequest();
}
catch(trymicrosoft){
try {
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
}
catch(othermicrosoft){
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlhttp;
}

/*
* 一个通用的AddEventListener函数,obj为DOM元素
*/
JsHelper.Event.addEventlistener=function(labelID,eventMode,fn)
{
var obj=JsHelper.DOM.$(labelID);
if (typeof window.addEventListener != undefined ) {
obj.addEventListener(eventMode, fn, false);
}
else
if (typeof document.addEventListener != undefined ) {
obj.addEventListener(eventMode, fn, false);
}
else
if (typeof window.attachEvent != undefined ) {
obj.attachEvent("on"+eventMode, fn);
}
else {
return false;
}
return true;
}

/*
*包含了一个Douglas Crockford对函数的method的扩展,下面的三个函数版权归Douglas Crockford所有,特此声明
*/
Function.prototype.method = function (name, func) {
this.prototype[name] = func;
return this;
};
Function.method( inherits , function (parent) {
var d = {}, p = (this.prototype = new parent());
this.method( base , function uber(name) {
if (!(name in d)) {
d[name] = 0;
}
var f, r, t = d[name], v = parent.prototype;
if (t) {
while (t) {
v = v.constructor.prototype;
t -= 1;
}
f = v[name];
} else {
f = p[name];
if (f == this[name]) {
f = v[name];
}
}
d[name] += 1;
r = f.apply(this, Array.prototype.slice.apply(arguments, [1]));
d[name] -= 1;
return r;
});
return this;
});
Function.method( swiss , function (parent) {
for (var i = 1; i var name = arguments[i];
this.prototype[name] = parent.prototype[name];
}
return this;
});

/*
* 解决IE不支持HTMLElement的一个解决方案
*/
var DOMElement ={
extend: function(name,fn)
{
if(!document.all)
{
eval("HTMLElement.prototype." + name + " = fn");
}
else
{
var _createElement = document.createElement;
document.createElement = function(tag)
{
var _elem = _createElement(tag);
eval("_elem." + name + " = fn");
return _elem;
}
var _getElementById = document.getElementById;
document.getElementById = function(id)
{
var _elem = _getElementById(id);
eval("_elem." + name + " = fn");
return _elem;
}
var _getElementsByTagName = document.getElementsByTagName;
document.getElementsByTagName = function(tag)
{
var _arr = _getElementsByTagName(tag);
for(var _elem=0;_elem<_arr.length>eval("_arr[_elem]." + name + " = fn");
return _arr;
}
}
}
};
/*
* 下面仿照jQuery之父John Resig的几个查询DOM的函数,连缀的能力
*/
DOMElement.extend("previous",function(){ // similar to previousSibling DOM Function
var elem=this;
do{
elem=elem.previousSibling;
}while(elem&&elem.nodeType!=1);
return elem;
});

DOMElement.extend("next",function(){ //similar to nextSibling DOm Function
var elem=this;
do{
elem=elem.nextSibling;
}while(elem&&elem.nodeType!=1);
return elem;
});
DOMElement.extend("first",function(num){ //similar to firstChild DOM Function,同parent
var elem=this;
num=num||1;
for (var i = 0; i elem = elem.firstChild;
}
return (elem && elem.nodeType!=1 ? next(elem):elem);
});
DOMElement.extend("last",function(num){ //similar to lastChild DOM Function,同parent
var elem=this;
num=num||1;
for (var i = 0; i elem = elem.lastChild;
}
return (elem && elem.nodeType!=1 ? prev(elem):elem);
});
DOMElement.extend("parent",function(num){ //可以返回几个num等级的parentNode,比如:parent(2)就等同于elem.parent().parent();
var elem=this;
num=num ||1;
for (var i = 0; i if (elem != null) {
elem = elem.parentNode;
}
}
return elem;
});
DOMElement.extend("hasChilds",function(){ //判断时候有子节点
if(this!=null && this.hasChildNodes()){
return true;
}
else{
return false;
}
});

DOMElement.extend("text",function(){ //得到标签内的文本,如果参数不为零,则可以设置标签内的文版,对input标签也同样适合
try{ //解决Firefox不支持InnerText的解决方案
HTMLElement.prototype.__defineGetter__("innerText",function(){
var anyString = "";
var childS = this.childNodes;
for(var i=0; iif (childS[i].nodeType == 1) {
anyString += childS[i].tagName == "BR" ? "n : childS[i].innerText;
}
else if(childS[i].nodeType == 3) {
anyString += childS[i].nodeValue;
}
}
return anyString;
});
}
catch(e){}
if (arguments.length == 1) {
if (this.innerText) {
this.innerText = arguments[0];
}
else {
this.value = arguments[0];
}
}
else {
return this.innerText || this.value;
}
});
DOMElement.extend("html",function(){ //得到元素的innerHTML,如果参数不为零,则可以设置元素内的文本和子节点
if(arguments.length==0){
return this.innerHTML;
}
else if(arguments.length==1)
{
this.innerHTML=arguments[0];
}
});

/*
* 下面是className的操作
*/
DOMElement.extend("getClassName",function(){ //返回元素className
if(this!=null&&this.nodeType==1){
return this.className.replace(/\s+/, ).split( );
}
return null;
});
DOMElement.extend("hasClassName",function(){ //判断是否有class类
if(this!=null&&this.nodeType==1){
var classes=this.getClassName();
for(var i=0;iif(arguments[0]==classes[i]) return true;
}
}else{
return false;
}
});

DOMElement.extend("addClass",function(){ //给元素添加类,可以一次性添加多个类
if(this!=null&&this.nodeType==1){
for (var i = 0; i this.className += (this.className ? : ) + arguments[i];
}
return this;
}
return null;
});
DOMElement.extend("removeClass",function(){ //删除类,如果没有参数,则删除全部的类
if (this != null && this.nodeType == 1) {
if (arguments.length == 0) {
this.className = "";
}
else if(arguments.length!=0) {
var classes=this.getClassName();
for (var i = 0; i for (var j = 0; j if (arguments[i]==classes[j]) {
classes = classes.join(" ").replace(arguments[i], ).split(" ");
}
}
}
this.className=classes.join(" ");
}
return this;
}
return null;
});
JsHelper.__toggleflag=false; //增加一个判断开关
DOMElement.extend("toggleClass",function(classname){ //两次点击调用的函数不同
if(this!=null && this.nodeType==1){
this.onclick=function(){
if(JsHelper.__toggleflag==false){
this.addClass(classname);
JsHelper.__toggleflag = true;
}else if (JsHelper.__toggleflag == true) {
this.removeClass(classname);
JsHelper.__toggleflag = false;
}
}
}
});
/*
* 给每个对象添加click方法,类似与jQuery的click方法的使用方式
*/
DOMElement.extend("click",function(){
if(this!=null && this.nodeType==1){
if(arguments.length==0){
alert("you have done nothing when you clicked.");
}else{
this.onclick=arguments[0];
}
}
});

/*
* 给每个对象扩展hover方法,此方法接受两个函数作为参数
*/
DOMElement.extend("hover",function(){
if(this!=null && this.nodeType==1){
if(arguments.length!=2){
alert("Require two function to be param.");
}else{
this.onmouseover=arguments[0];
this.onmouseout=arguments[1];
}
}
});
/*
* 给每个元素添加事件的函数
*/
DOMElement.extend("addEvent",function(eventtype,fn){
if(document.all){
this.attachEvent("on"+eventtype,fn);
}else{
this.addEventListener(eventtype,fn,false);
}
});
/*
* 给每个元素扩展css方法,接受一个属性和属性值作为参数
*/
DOMElement.extend("css",function(){
if(this!=null && this.nodeType==1){
if(arguments.length!=2){
alert("Require two function to be param.");
}else{
this.style[arguments[0]]=arguments[1]; //设置相关的style属性的值
return this;
}
}
return null;
});
/*
* //查找并返回存在某个类的全部的元素,name为className,type为HTML标签类型
*/
var hasClass = function(name,type){
var r = new Array();
//var re = new RegExp(name,"g");
var e=document.getElementsByTagName(type||"*");
for(var i=0;ivar classes=e[i].getClassName();
for (var j = 0; j if (name== classes[j]) {
r.push(e[i]);
}
}
}
return r;
}
/*
* 返回某个元素的特定的子元素引用的集合,如果没有元素调用该方法,则默认是document
*/
DOMElement.extend("find",function(){
var elem=this||document;
var r=new Array();
if(elem!=null && (elem.nodeType==1||elem.nodeType==9)){
var e=elem.getElementsByTagName(arguments[0]);
for(var i=0;ir.push(e[i]);
}
return r;
}
return null;
});

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