function openWindow(url, width, height, name)
   {
    var maxx = screen.availWidth;
    var maxy = screen.availHeight;
    var x    = (maxx - width) / 2;
    var y    = (maxy - height) / 2;

    var args = "width="+width+","+
               "height="+height+","+
               "toolbar=0,"+
               "menubar=0,"+
               "scrollbars=0,"+
               "resizable=1,"+
               "status=0,"+
               "location=0,"+
               "directories=0,"+
               "copyhistory=450";
    var name = window.open(url, name, args);

    name.moveTo(x, y);
   }

function openScrollWindow(url, width, height, name)
   {
    var maxx = screen.availWidth;
    var maxy = screen.availHeight;
    var x    = (maxx - width) / 2;
    var y    = (maxy - height) / 2;

    var args = "width="+width+","+
               "height="+height+","+
               "toolbar=0,"+
               "menubar=0,"+
               "scrollbars=1,"+
               "resizable=1,"+
               "status=0,"+
               "location=0,"+
               "directories=0,"+
               "copyhistory=450";
    var name = window.open(url, name, args);

    name.moveTo(x, y);
   }