var reEmail = /^\w+[\w\-\.]*@\w+[\w\-\.]*\.\w{2,4}(,\w+[\w\-\.]*@\w+[\w\-\.]*\.\w{2,4})*$/;

function trim(str)
{
	str = str.replace(/^(\s)*/, "");
	str = str.replace(/(\s)*$/, "");
	return str;
}

function validate(form) {

	if (trim(form.elements['realname'].value) == '')
	{
		alert('Please enter your name');
		form.elements['realname'].focus();
		return false;
	}
	
	if (reEmail.exec(form.elements['email'].value) == null)
	{
		alert('Please enter a valid e-mail address');
		form.elements['email'].focus();
		return false;
	}
	
	return true;
}