// JavaScript Document
function checkForm() {
	if(document.unsubsFrm.unsubscribe_email.value == '') {
		alert("Please enter you email address");
		document.unsubsFrm.unsubscribe_email.focus();
		return false;
	}
	
	var EmailFormat=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
	if(!EmailFormat.test(document.unsubsFrm.unsubscribe_email.value.trim()))
	{
		alert("Please enter a valid email address.");
		document.unsubsFrm.unsubscribe_email.focus();
		return false;
	}
	return true;
}