function isEmpty(theForm, strEleName, strLabel, blnUseAlert) {
   var docform = eval(theForm + '.' + strEleName);
   if (docform.value.length == 0) {
      if (blnUseAlert == true) {
         alert("Please enter a value for \"" + strLabel + "\"");
         docform.focus();
      }
      return true;
   } else {
      return false;
   }
}

function isEmail(theForm, strEleName) {
   var docform = eval(theForm + '.' + strEleName);
   var strEleVal = docform.value;

   if (strEleVal.length < 6) {
      alert("Please enter a valid email address.");
      docform.focus();
      docform.select();
      return false;
   }

   if (strEleVal.indexOf("@") < 1) {
      alert("Please enter a valid email address.");
      docform.focus();
      docform.select();
      return false;
   }

   if (strEleVal.indexOf(".") < 1) {
      alert("Please enter a valid email address.");
      docform.focus();
      docform.select();
      return false;
   }

   return true;
}