function Validator(contactForm)
{

			  if (contactForm.first_name.value == '' || contactForm.first_name.value == null)
			  {
				alert("Please enter your First Name.");
				contactForm.first_name.focus();
				return (false);
			  }
			  if (contactForm.last_name.value == '' || contactForm.last_name.value == null)
			  {
				alert("Please enter your Last Name.");
				contactForm.last_name.focus();
				return (false);
			  }
			  if (contactForm.email.value == '' || contactForm.email.value == null)
			  {
				alert("The email address must be filled in correctly to send the form. Please"
				+" check the prefix and '@' sign and try again.");
				contactForm.email.focus();
				return (false);
			  }				    
			  if (contactForm.move_in.value == '' || contactForm.move_in.value == null)
			  {
				alert("Please enter Move in Date.");
				contactForm.move_in.focus();
				return (false);
			  }
			  if (contactForm.move_out.value == '' || contactForm.move_out.value == null)
			  {
				alert("Please enter Move out Date.");
				contactForm.move_out.focus();
				return (false);
			  }
}