//<![CDATA[
// 用途：用户点击切换搜索条
	function showA() {		 
		$("a").style.display = "";
		$("b").style.display = "none";
		$("c").style.display = "none"; 
		Set("topbar","a");
	}
	function showB() {
		$("a").style.display = "none";
		$("b").style.display = "";
		$("c").style.display = "none"; 
		Set("topbar","b");
	}
	function showC() {
		$("a").style.display = "none";
		$("b").style.display = "none";
		$("c").style.display = ""; 
		Set("topbar","c");
	}
//]]>
// 用途：根据用户点击设置搜索条的默认显示
// 注意：需放在<div id="a"> <div id="b"> <div id="c"> 的下面
//<![CDATA[
		   //设置、读取cookie
function Set(ck_name,ck_value){
var Then = new Date() 
Then.setTime(Then.getTime() + 86400*1000) //一天
document.cookie = ck_name + "="+ ck_value + ";expires="+ Then.toGMTString() 
}
function Get(name){   
  var presence=document.cookie.indexOf(name);   
  if (presence!==-1){   
  var start=presence + name.length + 1;   
  var end=document.cookie.indexOf(";",start);   
  if (end==-1)  
  end=document.cookie.length;   
  var value=document.cookie.slice(start,end);   
  return value;   
  }   
  else return "undefined";   
}
//]]>
//<![CDATA[
		   //根据cookie判断
var ck_coke=Get("topbar");
if (ck_coke!=="undefined"){
   if (ck_coke=="a"){
		$("a").style.display = "";
		$("b").style.display = "none";
		$("c").style.display = "none";
   }
   if (ck_coke=="b"){
		$("a").style.display = "none";
		$("b").style.display = "";
		$("c").style.display = "none";
   }
   if (ck_coke=="c"){
		$("a").style.display = "none";
		$("b").style.display = "none";
		$("c").style.display = "";
   }

}
//]]>