function validation(user)
{
	if(user.email.value == "")
	{
		alert("Please enter E-mail Address.");
		user.email.focus();
		return false;
	}
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;

	if(!user.email.value.match(emailExp))
		{
		alert("Please enter valid E-mail Address.");
		user.email.focus();
		user.email.select();
		return false;
		}
	return true;

}