var $ = YAHOO.util.Dom.get;

function initRegister() {
	var updateUsername = function() {
		var givenName = $("form-givenName").value;
		var familyName = $("form-familyName").value;
		$("form-username").value = "" + givenName + " " + familyName;
	};
	
	YAHOO.util.Event.on("form-givenName", "change", updateUsername);
	YAHOO.util.Event.on("form-familyName", "change", updateUsername);
}