var winWidth = 700;
var winHeight = 480;

function popRoute (fn) {
	par = "left=" + Math.floor((screen.width-winWidth)/2) + ",width=" + winWidth;
	par += ",top=" + Math.floor((screen.height-winHeight)/2) + ",height=" + winHeight;
	par += ",scrollbars=yes,resizable=no";
	wh = window.open (fn + ".php", "Route", par);
	wh.focus();
}