// JavaScript Document
function checkMail( formId ) {
	var email = getEl( 'email' ).value;
	var formEl = getEl( formId );
	var filter  = /^\w([-\+\.\w\&]*[\w\&])?@(\w[-\w]+\.)+[-\w]{2,4}$/;
	if ( filter.test( email ) ) {
		formEl.submit();
	} else {
		alert('Please enter a valid email address');
	}
}

function getEl( el_id ) {
	var ele;
	if (document.getElementById) { // DOM3 = IE5, NS6
		ele = document.getElementById(el_id);
	} else {
		ele = document.all[el_id];
	}
	return ele;
}