function sousuo()
  {
     var kw=document.getElementById('kw').value;
     if(kw=="请输入关键字搜索")
     {
        document.getElementById('kw').value=""; 
				document.getElementById('kw').style.color="#606060";
		 } 

	}
	function likai()
	{
     var kw=document.getElementById('kw').value;
			if(kw=="")
			{
				document.getElementById('kw').value="请输入关键字搜索";
				document.getElementById('kw').style.color="#CCCCCC";
			}
		}