function SearchGo_Top()
{
    //alert(escape(document.getElementById('top_keyword').value));
	if(document.getElementById('top_keyword').value=='')
	{
	    alert('请输入关键字\n');
	    return;
	}
	if(document.getElementById('top_keyword').value=='请输入关键字')
	{
	    alert('请输入关键字\n');
	    return ;
	}
	window.location.href='/aspx/Search.aspx?keyword='+escape(document.getElementById('top_keyword').value);
	
}
function checksearchkeyword(theobject)
{
    if(theobject.value=='请输入关键字')
    {theobject.value='';}
    else if(theobject.value==''||theobject.value==null)
    {
    theobject.value='请输入关键字';
    }        
}