function bbt()
 {
 var obj = "ls";
 var url="/lushu/search.aspx";
 var str="";
 var inp = document.getElementById('lushu').value;
 if(Jtrim(inp) !== "" && Jtrim(inp) !== "输入关键词")
  {
  str += "?key=" + encodeURIComponent(Jtrim(inp)) ;
  window.open(url+str);
  }
  else
  {
  alert("请输入关键词");
  document.getElementById('lushu').focus();
  }
 }

function tag(n,obj,id_len){
	len=document.getElementById(id_len).getElementsByTagName('li').length;
	for(var i=1;i<=len;i++){
		var curC=document.getElementById(obj+"_"+i);
		var curB=document.getElementById(obj+"_t"+i);
		if(n==i){
			curC.style.display="block";
			curB.className="active"
		}else{
			curC.style.display="none";
			curB.className="normal"
		}
	}
}  

 function Jtrim(str)
{
	var i = 0;
	var len = str.length;
	
	if(str == "")
	{
		return(str);
	}
	
	j = len -1;
	flagbegin = true;
	flagend = true;
	
	while((flagbegin == true) && (i< len))
	{
		if(str.charAt(i) == " ")
		{
			i = i + 1;
			flagbegin = true;
		}
		else
		{
			flagbegin = false;
		}
	}
	
	while((flagend == true) && (j >= 0))
	{
		if(str.charAt(j) == " ")
		{
			j = j - 1;
			flagend = true;
		}
		else
		{
			flagend = false;
		}
	}
	
	if(i > j)
	{
		return ("");
	}
	
	trimstr = str.substring(i,j+1);
	return trimstr;
}