function launchFull(url, name, height, width) 

{
  var str = "height=" + height + ",innerHeight=" + height;
  str += ",width=" + width + ",innerWidth=" + width;
  if (window.screen) 
  {
    var ah = screen.availHeight - 30;
    var aw = screen.availWidth - 10;

    var xc = (aw - width) / 2;
    var yc = (ah - height) / 2;

    str += ",left=" + xc + ",resizable=no,menubar=no,locationbar=no,status=no,scrollbars=yes,screenX=" + xc;
    str += ",top=" + yc + ",screenY=" + yc;
  }
  window.open(url, name, str);
}

function openGB() {
window.open("http://gb.webmart.de/gb.cfm?id=941000","","height=500,width=600,left=150,top=150,scrollbars=yes");
}