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);
}

preventSelection(document);


function pw() {return window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth}; function mouseX(evt) {return evt.clientX ? evt.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft) : evt.pageX;} function mouseY(evt) {return evt.clientY ? evt.clientY + (document.documentElement.scrollTop || document.body.scrollTop) : evt.pageY} function popUp(evt,oi) {if (document.getElementById) {var wp = pw(); dm = document.getElementById(oi); ds = dm.style; st = ds.visibility; if (dm.offsetWidth) ew = dm.offsetWidth; else if (dm.clip.width) ew = dm.clip.width; if (st == "visible" || st == "show") { ds.visibility = "hidden"; } else {tv = mouseY(evt) + 20; lv = mouseX(evt) - (ew/4); if (lv < 2) lv = 2; else if (lv + ew > wp) lv -= ew/2; lv += 'px';tv += 'px';  ds.left = lv; ds.top = tv; ds.visibility = "visible";}}}