function open_subcwindow(url, name, wHeight, wWidth) {
    sWidth = screen.availWidth;
    sHeight = screen.availHeight;
    x = (sWidth - wWidth) / 2;
    y = (sHeight - wHeight) / 2;
   newWin = window.open(url, name, "width="+wWidth+",height="+wHeight);
    newWin.moveTo(x,y);
 }