function validate() {
	var x;
	var blank;
	var invalidFlag = 0;
	for (x in fields) {
		blank = 1;
		if ($(fields[x]) && $(fields[x]).value == '') {
			$(fields[x]).className = "invalid";
			invalidFlag = 1;
		} else if ($(fields[x])) {
			$(fields[x]).className = 'lg';
		}
	}
	if (invalidFlag) {
		alert("Please complete all required fields before proceeding.");
		return false;
	}
	else {
		return true;
	}
}

function $(id) {
	return document.getElementById(id);
}