function isEmailAddress( dato )
{

var s = dato; //document.getElementById("email").value;
//var filter=/^[A-Za-z][A-Za-z0-9_]*-*@[A-Za-z0-9_]+\.[A-Za-z0-9_.]+[A-za-z]$/;
var filter=/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/

if (s.length == 0 ) return true;
if (filter.test(s))
	return true;
else
	return false;
}


function checkForm() {
name = document.getElementById("name").value;
email = document.getElementById("email").value;
comments = document.getElementById("comments").value;

if (name == "") {
hideAllErrors();
document.getElementById("nameError").style.display = "block";
document.getElementById("name").select();
document.getElementById("name").focus();
return false;
} 



if (email == "") {
	hideAllErrors();
	document.getElementById("emailError").style.display = "block";
	document.getElementById("email").select();
	document.getElementById("email").focus();
	return false;
}


if (!isEmailAddress(email))
{
	hideAllErrors();
	document.getElementById("emailError").style.display = "block";
	document.getElementById("email").select();
	document.getElementById("email").focus();
	return false;
}


if (comments == "") {
	
hideAllErrors();
document.getElementById("commentsError").style.display = "block";
document.getElementById("comments").select();
document.getElementById("comments").focus();
return false;
}
return true;
}
 
function hideAllErrors() {
document.getElementById("nameError").style.display = "none";
document.getElementById("emailError").style.display = "none";
document.getElementById("commentsError").style.display = "none";
//document.getElementById("fileError").style.display = "none";
}
// JavaScript Document