//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) {alert("禁止右键复制！"); } }
{
event.cancelBubble = true
event.returnValue = false;
return false;
}

}

document.oncontextmenu = nocontextmenu; // for IE5+
//document.onmousedown = norightclick; // for all others



function key(){ 
if(event.shiftKey){
event.cancelBubble = true
event.returnValue = false;
return false;}
//禁止Shift
if(event.altKey){
event.cancelBubble = true
event.returnValue = false;
return false;}
//禁止Alt
if(event.ctrlKey){
event.cancelBubble = true
event.returnValue = false;
return false;}
//禁止Ctrl
return false;}
document.onkeydown=key;
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;}
}