function MTMcatchRight(thisEvent) {
  if(thisEvent) {
    if (thisEvent.which == 3 || thisEvent.which == 2) {
      alert("Rechter muisknop heeft geen functionaliteit op deze site.");
      return false;
    }
  } else if(event && (event.button == 2 || event.button == 3)) {
      alert("Rechter muisknop heeft geen functionaliteit op deze site.");
    return false;
  }
  return true;
}

function initializeRM() {
  document.onmousedown = MTMcatchRight;
  if(document.layers) {
    window.captureEvents(Event.MOUSEDOWN);
  }
  window.onmousedown = MTMcatchRight;
}

function testCss() {
  document.write ('<style> ');
  document.write ('div.mainFrame { ');
  document.write ('position: relative; ');
  document.write ('width: 100%; ');
  document.write ('height: ' + (document.body.clientHeight - 125) + '; ');
  document.write ('left: 0; top: 10; ');
  document.write ('border: 0px solid black; ');
  document.write ('overflow: auto; ');
  document.write ('} ');

  document.write ('div.mainFrame_Content { ');
  document.write ('position: absolute; ');
  document.write ('width: ' + (document.body.clientWidth - 305) + '; ');
  document.write ('height: 100%; ');
  document.write ('left: 300;  ');
  document.write ('top: 0;  ');
  document.write ('overflow: auto;  ');
  document.write ('border: 0px solid black; ');
  document.write ('} ');
  document.write ('</style> ');
}

//initializeRM();

//if (screen.width == 800) {
//  document.write ('<LINK REL="stylesheet" HREF="css/gbi800.css" TYPE="text/css">');
//}

//testCss();