//简写函数
$ = function(obj){return document.getElementById(obj);}
$1 = function(obj){return document.getElementsByName(obj);}

//标签切换
var arr = new Array("l1","t1","s1","","");
show = function(num,obj,cssCur,cssNor,cssContCur){
	try{
		
		if(typeof(obj)=="string") obj = $(obj);
		if(obj){
			
			if(num==2){
				setTimeout(function(){
					if(obj.id!=arr[num]){
						if(arr[num]!=""){
							$(arr[num]).className=cssNor;
							$(arr[num]+"_cont").style.display="none";
							arr[num] = obj.id;
							obj.className=cssCur;
							$(obj.id+"_cont").className=cssContCur;
							$(obj.id+"_cont").style.display="block";
						}
					}
				},100);
			}else{
				if(obj.id!=arr[num]){
					if(arr[num]!=""){
						$(arr[num]).className=cssNor;
						$(arr[num]+"_cont").style.display="none";
						arr[num] = obj.id;
						obj.className=cssCur;
						$(obj.id+"_cont").style.display="block";
					}
				}
			}
			
		}else{
			alert("没有此对象");	
		}
		
	}catch(e){
		alert(e.message);
	}
}