function validSelect(oSelect)
{
	if (oSelect.options[oSelect.selectedIndex].value == ""||oSelect.options[oSelect.selectedIndex].value == 0)
	{
		return false 
	}
return true 
}

function check(theform)
{
   if(theform.keywords.value == "" || theform.keywords.value==" ")
   {
   		alert("Please input search keywords!");
		theform.keywords.focus();
		return false ;
   }
   return true;     
 }