function checkform (form)
{
    if (form.FName.value == "")
	{
		alert( "Please enter your first name." );
		form.FName.focus();
		return false ;
  	}
  
  	if (form.LName.value == "")
	{
		alert( "Please enter your surname." );
		form.LName.focus();
		return false ;
  	}
	
	if (form.Email.value == "")
	{
		alert( "Please enter your email address." );
		form.Email.focus();
		return false ;
  	}
}