function SubmitKeyClick(button) 
{ 
if (event.keyCode == 13)
{ 
event.keyCode=9;
event.returnValue = false;
document.all[button].click(); 
} 
} 

function search_onclick()
{
    if(document.all["KeyWord"].value!="")
    {
        var url=document.all.KeyType.value+encodeURI(document.all["KeyWord"].value);
        top.location.href=url;
    }
    else
        alert("请输入搜索关键字！");
}