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;
}
}

document.oncontextmenu = nocontextmenu; //对ie5.0以上
document.onmousedown = norightclick; //对其它浏览器



function MM_displayStatusMsg(msgStr) { //v1.0
  status=msgStr;
  document.MM_returnValue = true;
}