function checkSearch()
{

  		if (document.myformType.SearchKeywords.value == "" || document.myformType.SearchKeywords.value == "输入查询关键字")        
  		{        
   		 alert("请输入查询关键字！");        
   		 document.myformType.SearchKeywords.focus();        
   		 return (false);        
 		 }  
  
		 
    document.myformType.submit()
		 
}