function changeLoc(id) {
	url = document.getElementById(id).value;
	document.location = url;
	return true;
}

function PopupCentrata(url) {
	   var w = 600;
	   var h = 400;
	   var l = Math.floor((screen.width-w)/2);
	   var t = Math.floor((screen.height-h)/2);
	   window.open(url,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l + ",scrollbars=1" + ",resizable=no");
}