// JavaScript Document
try{
 document.execCommand("BackgroundImageCache", false, true);
}catch(e){}
function $(element){
 if(arguments.length>1){
  for(var i=0,elements=[],length=arguments.length;i<length;i++)
   elements.push($(arguments[i]));
  return elements;
 }
 if(typeof element=="string")
  return document.getElementById(element);
 else
  return element;
}
var Class={
 create:function(){
  return function(){
   this.initialize.apply(this,arguments);
  } 
 }
}
Object.extend=function(destination,source){
 for(var property in source){
  destination[property]=source[property];
 }
 return destination;
}
var tabMenu=Class.create();
tabMenu.prototype={
 initialize:function(container,selfOpt,otherOpt){
  this.container=$(container);
    var selfOptions=Object.extend({fontWeight:"bold",fontSize:"12px",color:"#FFBC44"},selfOpt||{});
  var otherOptions=Object.extend({fontWeight:"normal",fontSize:"12px",color:"#666"},otherOpt||{});
  //用for循环得到objs数组,主要是为了兼容非IE浏览器把空白也当作子对象
  for(var i=0,length=this.container.childNodes.length,objs=[];i<length;i++){
   if(this.container.childNodes[i].nodeType==1)
    objs.push(this.container.childNodes[i]);
  }
  var tabArray=objs[0].getElementsByTagName("li");
  //用for循环得到divArray数组,主要是为了兼容非IE浏览器把空白也当作子对象
  var divArray=new Array();
  for(i=0,length=objs[1].childNodes.length;i<length;i++){
   if(objs[1].childNodes[i].nodeType==1)
    divArray.push(objs[1].childNodes[i]);
  }
  
  for(i=0,length=tabArray.length;i<length;i++){
   tabArray[i].length=length;
   tabArray[i].index=i;
   tabArray[i].onmouseover=function(){
    //其它选项卡样式设置
    for(var j=0;j<this.length;j++){
     tabArray[j].style.backgroundPosition="-"+tabArray[j].offsetWidth+"px 0";
     for(var property in selfOptions){
      tabArray[j].firstChild.style[property]=otherOptions[property];
     }
    }
    //当前选项卡样式
    this.style.backgroundPosition="0 0";
    for(var property in selfOptions){
     this.firstChild.style[property]=selfOptions[property];
     /*
      注意this.style.property和selfOptions.property的用法错误
      style.fontWeight正确
      style["fontWeight"]正确
      style["font-weight"]错误
     */
    }
    //隐藏其它选项卡
    for(j=0;j<this.length;j++){
     divArray[j].style.display="none";
    }
    //显示当前选项卡
    divArray[this.index].style["display"]="block";
   }
  }
 }
}
var tab1=new tabMenu("tabbox",{fontSize:"14px",color:"#FFBC44",fontWeight:"bold"},{fontWeight:"normal",color:"#666"});