function Validationkeyword(theform)
{
  if (theform.keyword.value == "")
  {
    alert("Please enter your search keyword.");
    theform.keyword.focus();
    return (false);
  }
    return (true);
 } 
   
 function ValidateSelect(theform)
{
  if (theform.brand.value == "" || theform.cat.value == "")
  {
    alert("Please choice your search brand and category.");
    return (false);
  }
    return (true);
 }