document.oncontextmenu = function () { return false; };
          if (document.addEventListener) {
             document.addEventListener("mousemove", mousemover, false);
             document.addEventListener('mousedown', mouseclicker, false);
          }
          else if (document.attachEvent) {
             document.attachEvent("onmousemove", mousemover);
             document.attachEvent('onmousedown', mouseclicker);
          }
          else if (document.captureEvents) {
             window.captureEvents(Event.MOUSEDOWN);
             window.onMouseDown = mouseclicker;
             window.onmousemove = mousemover;
          }