用js实现的仿sohu博客更换页面风格（简单版）_javascript技巧

prowin.js

/**
* @author ldgmc
*/
function PopWin(id,width,title){
this.id=id;
this.width=width;
this.title=title;
this.createIns=function(){
var ins=document.createElement("div");
ins.className="popWin";
ins.id=this.id;
ins.style.width=this.width+'px';
return ins;
};
this.items=new Array();
this.instance=this.createIns();
this.init=function(){
this.addTitle(this.title);
document.body.appendChild(this.instance);
}
this.addTitle=function(title){
var titleDiv=document.createElement("div");
titleDiv.className="title";
var titleText=document.createTextNode(title);
titleDiv.appendChild(titleText);
this.instance.appendChild(titleDiv);
}
this.addItem=function(id,title){
this.items[id]={};
this.items[id]["title"]=ldg.common.setClassName("div","itemTitle");
this.items[id]["title"].appendChild(document.createTextNode(title));
this.items[id]["content"]=ldg.common.setClassName("div","itemContent");
this.items[id]["title"].id=id;
ldg.event.addEvent(this.items[id]["title"],"mouseover",this.mouseover.bindAsEventListener(this))
ldg.event.addEvent(this.items[id]["title"],"mouseout",this.mouseout.bindAsEventListener(this));
ldg.event.addEvent(this.items[id]["title"],"click",this.click.bindAsEventListener(this));
this.instance.appendChild(this.items[id]["title"]);
this.instance.appendChild(this.items[id]["content"]);
}
this.addItemContent=function(parentId,imgUri,cssUri,isLast){
var itemDiv=ldg.common.setClassName("div","item");
var itema=document.createElement("a");
itema.href="#";
var itemImg=document.createElement("img");
itemImg.src=imgUri;
itemImg.css=cssUri;
ldg.event.addEvent(itemImg,"click",this.changeLink.bindAsEventListener(this));
itema.appendChild(itemImg);
itemDiv.appendChild(itema);
this.items[parentId]["content"].appendChild(itemDiv);
if(isLast){
this.items[parentId]["content"].appendChild(document.createElement("br"));
}

}
this.changeLink=function(e){
var eObj=e.srcElement || e.target;
var link=document.getElementsByTagName("link");
link[1].href=eObj.css;
}
this.mouseover=function(e){
var eObj=e.srcElement || e.target;
eObj.style.backgroundColor="#e5e5e5";
}
this.mouseout=function(e){
var eObj=e.srcElement || e.target;
eObj.style.backgroundColor="#EEEEEE";
}
this.click=function(e){
var eObj=e.srcElement || e.target;
var item=this.items[eObj.id]["content"];
item.style.display=="block"?item.style.display="none":item.style.display="block";
}
this.init();

ldg.js
var ldg=window.ldg || {}
Array.prototype.append=function(item){
this[this.length]=item
}
Function.prototype.bindAsEventListener=function(obj){
var _method=this;
return function(event){
return _method.call(obj,event || window.event);
}
}
ldg.event={
addEvent:function(obj,evType,fun){
if(obj.addEventListener){
obj.addEventListener(evType,fun,false);
return true;
}else if(obj.attachEvent){
obj.attachEvent("on"+evType,fun);
return true;
}else{return false}
}
}
ldg.common={
$:function(id){
return document.getElementById(id);
},
setClassName:function(eleType,className){
var element=document.createElement(eleType)
element.className=className;
return element;
}
}