function SubmitSearch(searchUrl)
{
    if(document.getElementById("txtSearch"))
    {
        var txtSearch = document.getElementById("txtSearch").value;
       if(txtSearch == "" ||  txtSearch == "搜索")
       {
            alert("请输入搜索关键字！");
           document.getElementById("txtSearch").onfocus();
           return false; 
       }
       else
       {
            window.location.href = searchUrl + "&keyword=" + encodeURIComponent(txtSearch);
       }
    }
}

function InputKeyDown()
{
    if(document.getElementById("btnSearch"))
    {
        if(event.keyCode && event.keyCode == 13)
        {
            document.getElementById("btnSearch").onclick();
        }
    }
}