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; 
document.onmousedown = norightclick;
document.onselectstart=new Function("event.returnValue=false");
document.onkeydown=CtrlKeyDown;
function CtrlKeyDown(){
	if ((event.shiftKey)&&(event.keyCode==68)){
		document.oncontextmenu = new Function("event.returnValue=true"); 
		document.onmousedown = new Function("event.returnValue=true");
		document.onselectstart=new Function("event.returnValue=true");
	}
}