/***********************
* Validating form
***********************/

function checkform ( form )
{
  var x = document.forms[0].email.value;
  var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;

  // ** START **
  if (form.name.value == "") {
    alert( "Please enter your full name." );
    form.name.focus();
    return false ;
  }

  if (form.email.value == "") {
    alert( "Please enter your email address." );
    form.email.focus();
    return false ;
  }

  if (filter.test(x))
		 if (form.message.value == "") {
			alert( "Please type your message." );
			form.message.focus();
			return false ;
		  } 
		  else {
			return true ;
		  }
  else {
  	alert(form.email.value  + " is not a valid email address. \nPlease enter again.");
    form.email.focus();
    return false ;
  }

// ** END **

  return true ;
}