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

 // JavaScript Document