function open_window(src,sizeX,sizeY)
{
 sY = 280;
 sX = 320;
 window.open(src,'wi','toolbar=no location=no,directories=no,status=yes,menubar=no, scrollbars=no,resizable=yes,fullscreen=no,channelmode=no,width='+sX+',height='+sY+',top=400,left='+(screen.width/2-sX/2));
}