function NeedValue(obj,err) {   
   if (trimAll(document.getElementById(obj).value) == '') {
      SetFocus(obj);	
      alert(err);
      return false;
   }
}

function trimAll(sString) {
   while (sString.substring(0,1) == ' ') {
       sString = sString.substring(1, sString.length);   }
   while (sString.substring(sString.length-1, sString.length) == ' ')   {
       sString = sString.substring(0,sString.length-1);   }
   return sString;
}

function SetFocus(obj) 
{
    try {
       	document.getElementById(obj).focus();
    }
    catch(e)
    {}
}