var win;
function gm(x,y) {
	url='http://maps.google.co.uk/maps?f=q&hl=en&q='+x+','+y;
	showwin(url,'Tube');
}
function showwin(url,title,w,h) {
	if (!w) { w=640; }
	if (!h) { h=480; }
	if (!win || win.closed) {
		win = window.open(url,title,
		"width="+w+",height="+h+",resizable=1,titlebar=0,scrollbars=1,status=0,location=0");
	} else {
		win.location.href=url;
		win.innerWidth=w;
		win.innerHeight=h;
	}
	win.focus();
}