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; 
} 

} 

function noonkeydown()
{
if(event.keyCode==116
　　 ||event.keyCode==37
　　 ||event.keyCode==39
　　 ||event.keyCode==121
　　 ||event.keyCode==115
　　 ||(window.event.srcElement.tagName == "A" && window.event.shiftKey)
)
{
event.keyCode=0;
event.cancelBubble=true;
return false;
}
}
document.oncontextmenu = nocontextmenu; 
document.onmousedown = norightclick; 
document.onkeydown = noonkeydown;