function preventSelection(element){
      var preventSelection = false;

      function addHandler(element, event, handler){
        if (element.attachEvent) 
          element.attachEvent('on' + event, handler);
        else 
          if (element.addEventListener) 
            element.addEventListener(event, handler, false);
      }
      function removeSelection(){
        if (window.getSelection) { window.getSelection().removeAllRanges(); }
        else if (document.selection && document.selection.clear)
          document.selection.clear();
      }
      function killCtrlA(event){
        var event = event || window.event;
        var sender = event.target || event.srcElement;

        if (sender.tagName.match(/INPUT|TEXTAREA/i))
          return;

        var key = event.keyCode || event.which;
        if (event.ctrlKey && key == 'A'.charCodeAt( 0 ))  
        {
          removeSelection();

          if (event.preventDefault) 
            event.preventDefault();
          else
            event.returnValue = false;
        }
      }


      addHandler(element, 'mousemove', function(){
        if(preventSelection)
          removeSelection();
      });
      addHandler(element, 'mousedown', function(event){
        var event = event || window.event;
        var sender = event.target || event.srcElement;
        preventSelection = !sender.tagName.match(/INPUT|TEXTAREA/i);
      });

      addHandler(element, 'mouseup', function(){
        if (preventSelection)
          removeSelection();
        preventSelection = false;
      });


      addHandler(element, 'keydown', killCtrlA);
      addHandler(element, 'keyup', killCtrlA);
    }