function openWindow(mapage,width,height) 
{
        var y=(screen.height-height)/2;     
		var x=(screen.width-width)/2;
        window.open(mapage,'','toolbar=no,location=no,scrollbars=no,resizable=no,directories=no,menubar=no,statusbar=no,status=no,width='+width+',height='+height+',screenX='+x+',screenY='+y+',top='+y+',left='+x);
}