Javascript universal simple table tab implementation_javascript skills

< ;script type="text/javascript" src="table.js">

< ;meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

/**
* @author Sky
*/
var table=function(index,id,active)
{
table=new Table(index,id, active);
table.bind();
}
var Table=function(index,id,active)
{
this.index=parseInt(index);
this .arr=document.getElementById(id).getElementsByTagName("li");
this.active=active;
}
Table.prototype={
bind:function()
{
this.arr[this.index].className=this.active;//Initialization
var _self=this;
for (var i = 0; i < this.arr.length; i )
{
this.arr[i].setAttribute("ext", i);
this.arr[i].onclick = function(e)
{
var _e = window .event||e;
var _target=_e.srcElement || _e.target;
_self.setClass(parseInt(_target.getAttribute("ext")));
}
}
},
setClass:function(index)
{
this.arr[this.index].className="";
this.arr[index].className=this.active;
this.index=index;
}
}