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;
   
   }
   
   
function ValidateForm(form)
{
   var alertList = '', numOfProbs = 0;
   if(form.name.value == 0)
   {
	alertList = '\nPlease enter your name';
	numOfProbs++;
   }
      if(form.email.value == 0)
   {
	alertList = '\nPlease enter your email address';
	numOfProbs++;
   }
      if(form.message.value == 0)
   {
	alertList = '\nPlease enter a message';
	numOfProbs++;
   }
  if(numOfProbs > 0)
   {
  	alert(alertList);
	return false;
   }
   else
   {
	return true;
   }
}