// JavaScript Document
 function checkproductsearch(){
   if(pmysearch.pkeyword.value==''){
     alert("请输入关键字");
	 pmysearch.pkeyword.focus();
	 return false;
   }
   if(pmysearch.classid.value==''){
     alert("请选择产品类型");
	 pmysearch.classid.focus();
	 return false;
   }
   if(pmysearch.PstrField.value==''){
     alert("请选择产品字段");
	 pmysearch.PstrField.focus();
	 return false;
   }
   return true;
 }