function GetSear()
      {
         var valueStr=document.getElementById("seaValue").value;
         if(valueStr=="")
         {
             alert("搜索条件不能为空！");
             return false;
         }
         window.open("product.aspx?seaValue="+encodeURI(valueStr));
      }
      function selNva(obj)
      {
           var s=document.getElementById(obj).src;
          
           document.getElementById(obj).src=s.replace("2.jpg",".jpg");
      }
      

    function showItem(obj) {
        var list = document.getElementById("menuBox").getElementsByTagName("li");
        list[obj].className = "navlibg";        
    }
    function showItem2(obj) {
        var list = document.getElementById("menuBox").getElementsByTagName("li");
        list[obj].className = "navlibg2";
        if (document.getElementById("navtext")) {
            document.getElementById("navtextspace").innerHTML = document.getElementById("navtext").innerHTML;
            document.getElementById("navtext").innerHTML = "";
        }
    }
     function showItem3(obj) {
        var list = document.getElementById("menuBox2").getElementsByTagName("li");
        list[obj].className = "navlibg3";   
        
        document.getElementById("navtextspace").innerHTML=document.getElementById("navtext").innerHTML; 
        document.getElementById("navtext").innerHTML="";          
    }