ÿþ function disableCtrlKeyCombination(e) {

    var forbiddenKeys = new Array('a', 'n', 'c', 'x', 'v', 'j');

    var key;

    var isCtrl;

  

    if(window.event) {

      key = window.event.keyCode;

      if(window.event.ctrlKey) {

        isCtrl = true;

      } else {

        isCtrl = false;

      }

    } else {

      key = e.which;

      if(e.ctrlKey) {

        isCtrl = true;

      } else {

        isCtrl = false;

      }

    }    

    if(isCtrl) {

      for(i=0; i<forbiddenKeys.length; i++) {

        if(forbiddenKeys[i].toLowerCase() == String.fromCharCode(key).toLowerCase()) {

          return false;

        }

      }

    }

    return true;

  } 

  

  function click(e) {

    if(document.all) {

      if(event.button == 2) {

        return false;

      }

    }

    if(document.layers) {

      if(e.which == 3) {

        return false;

      }

    }

  }  

  

  if(document.layers) {

    document.captureEvents(Event.MOUSEDOWN);

  }

  

  if(document) {

    document.onmousedown=click;    

    document.onkeypress=disableCtrlKeyCombination;

    document.onkeydown=disableCtrlKeyCombination;

    document.oncontextmenu=function() { return false; };

  }