function popupInfoWindow(url) {
	screen_width = screen.width;
	screen_height = screen.height;
	widthm = (screen_width-680)/2;
	heightm = (screen_height-340)/2;
	window.open(url,"infowindow"+doRand(), "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=680,height=400,left="+widthm+",top="+heightm);
}
function doRand()
{
	var num;
	now=new Date();
	num=(now.getSeconds());
	num=num+1;
	return num;
}