// JavaScript Document
function checkEmail(email){
	var er = new RegExp(/^[A-Za-z0-9_\-\.]+@[A-Za-z0-9_\-\.]{2,}\.[A-Za-z0-9]{2,}(\.[A-Za-z0-9])?/);
	if(	er.test(email)	) return true;
	else false;
}
function $(id){ return document.getElementById(id); }