function validateFiveMythsForm()
{
   firstName = document.fiveMythsForm.firstName.value;
   lastName = document.fiveMythsForm.lastName.value;
   email = document.fiveMythsForm.email.value;

   if(isEmpty(firstName))
   {
      alert("Please enter your first name.")
   }
   else if(isEmpty(lastName))
   {
     alert("Please enter your last name.")
   }
   else if(email.indexOf("@") == -1)
   {
     alert("Please enter a valid email address.")
   }
   else if(email.indexOf(".") == -1)
   {
     alert("Please enter a valid email address.")
   }
   else
   {
     document.fiveMythsForm.submit();
   }
}

function isEmpty(x)
{
   var empty = true;
   for (var i=0; i<x.length; ++i)
   {
      if (x.charAt(i) != " ")
      {
         empty = false;
         break;
      }
   }

   return empty;
}