function validateForm(form) {
	if (form.realname.value == "") {
	   alert("Please enter your name."); 
	   form.realname.focus( ); 
	   return false; 
	}
	if (form.telephonenumber.value == "") {
	   alert("Please enter your telephone number."); 
	   form.telephonenumber.focus( ); 
	   return false; 
	}
	if (form.emailaddress.value == "") {
	   alert("Please enter your email address."); 
	   form.emailaddress.focus( ); 
	   return false; 
	}
}