function checkMail(email) {
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(email)) return true;
	else alert('The address email you have entered is not valid!');
}

function emailPopup (form, specId) {
if (specId) {
	specId=specId;
}
else {
	//Set up a default id if not given
	specId='http://lists.ipcmedia.com/cgi-bin/CLOsubscribe.cgi/75?email_addr=';
}

if(checkMail(form.email_addr.value)) {
	emailURL = specId + form.email_addr.value;
	window.open(emailURL, "emailPopup", 'height=400,width=550,status=no,toolbar=no,menubar=no,scrollbars=yes,resizable=yes,location=no');
}
return false
}

function blankText(component) {
	if (component.value.length > 0)
		component.value = '';
}