function checkform ( form )
{
  if (form.name.value == "") {
    alert( "Please enter a Contact Name" );
    form.name.focus();
    return false ;
  }
  
  	var x = document.forms[0].email.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (!filter.test(x)) {
		alert('Invalid Email Address! Please check it');
		form.email.focus();
		return false ;
	}
	
	
   if (form.message.value == "") {
    alert( "Please fill in the message section" );
    form.message.focus();
    return false ;
  }
  
   if (form.code_post_text.value == "") {
    alert( "Please enter the code as you see it in the white box" );
    form.code_post_text.focus();
    return false ;
  }
  
  return true ;
}