function ValidateEmail(form) {
Ctrl = form.email;
if (Ctrl.value == "" || Ctrl.value.indexOf ('@', 0) == -1 || Ctrl.value.indexOf ('.', 0) == -1) {
return (false);
} else
return (true);
} 

function ValidateDate(form) {
Ctrl = form.dateinternal;
if (Ctrl.value == "" || Ctrl.value.length != 8 || !IsNumeric(Ctrl.value)) {
return (false);
} else
return (true);
} 

function showErrorMessage(form, ctrl, value, message) {
      alert(message);
}

function IsNumeric(sText)
{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}