//***********************禁止右键***************************
if (window.Event)
  document.captureEvents(Event.MOUSEUP);
 
function nocontextmenu()
{
 event.cancelBubble = true
 event.returnValue = false;
 
 return false;
}
 
function norightclick(e)
{
 if (window.Event)
 {
  if (e.which == 2 || e.which == 3)
   return false;
 }
 else
  if (event.button == 2 || event.button == 3)
  {
   event.cancelBubble = true
   event.returnValue = false;
   return false;
  }
}

//************************禁止选择***************************
function noSelect()
{
 return false;
}

//************************禁止拖曳***************************
function noDragstart()
{
  return false; 
}

//************************清空剪切板*************************
 function keyDown()
 {
  var iekey = event.keyCode;
  //alert(iekey);
    if(iekey == 42)
    {
    //window.clipboardData.setData('img','')
 
 window.clipboardData.clearData();
    }
 }

document.oncontextmenu = nocontextmenu;
document.onmousedown = norightclick;
document.ondragstart = noDragstart;
document.onselectstart = noSelect;
document.onselect = document.selection.empty();
document.onkeydown = keyDown;