function pop_up(uri,window_name,w,h) {
	var prop = 'width=' + w + ',height=' + h + ',status=no,scrollbars=no,resizeable=no,toolbar=no,menubar=no';
	window.open(uri, window_name, prop);
	return false;
}

function emailIsValid(str){
	var isValid = true;
	var regex = /^[a-z0-9\._-]+@([a-z0-9_-]+\.)+[a-z]{2,6}$/i;
	if (!regex.test(str)) isValid = false;
	return isValid;
}