var _trim = /^[\s\n\t]*([\s\S]*\S)[\s\n\t]*$/;
function __trim(_value) { return _trim.exec(_value) ? RegExp.$1 : ""; }

var _isemail = /^\s*(\S+\@\S+\.\S+)\s*$/;
function __isemail(_value) { return this._isemail.exec(_value) }

function checkFreeGiveaway() {

	var name = __trim(document.getElementById("name").value);
	var email = __trim(document.getElementById("email").value);
	
	if(name && email && __isemail(email))
		return true;

	alert("Please enter your name & email");
	
	return false;
	
}