function popupwindow(windowURL){
	var windowName="map";
	var windowWidth = 500;
	var windowHeight = 560;
	var shiftx = screen.width/2-windowWidth/2;
	var shifty = screen.height/2-windowWidth/2;
	var params = "toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes" + ",left=" + shiftx + ",top=" + shifty + ",height=" + windowHeight + ",width=" + windowWidth;
	win = window.open(windowURL, windowName, params )
	win.window.focus();
}