String.prototype.LTrim = function(){return LTrim(this);} 
function LTrim(str) 
{ 
var i; 
for(i=0;i<str.length;i++) 
{ 
if(str.charAt(i)!=" "&&str.charAt(i)!=" ")break; 
} 
str=str.substring(i,str.length); 
return str; 
} 

function check()
{
  var url;
  var s_key = document.getElementById("searchbox1").value;
  s_key = s_key.LTrim();
  if (s_key == "搜索最新废油资讯内容" || s_key ==""){
	  alert("请输入搜索关键字!") ;
	  document.getElementById("searchbox1").value = "" ;
	  document.getElementById("searchbox1").focus();
	  return false ;
  }
  s_key = encodeURIComponent(s_key);
  url = '/search/' +s_key + '/';
  var d = new Date();
  var windowName = parseInt(d.getHours().toString() + d.getMinutes().toString() + d.getSeconds().toString()/3);
  window.open(url,"so_" + windowName); 
}