var menu; 
function showMenu (evt) { 
if (document.all) { 
	document.all.contextMenu.style.pixelLeft = event.clientX + document.body.scrollLeft;
	document.all.contextMenu.style.pixelTop = event.clientY + document.body.scrollTop; 
	document.all.contextMenu.style.visibility = 'visible'; 
	return false; 
} 
else if (document.layers) { 
	if (evt.which == 3) { 
		document.contextMenu.left = evt.x; 
		document.contextMenu.top = evt.y; 
		document.contextMenu.onmouseout = function (evt) { this.visibility = 'hide'; }; 
		document.contextMenu.visibility = 'show'; 
		return false; 
	} 
} 
return true; 
}
 
if (document.all) 
	document.oncontextmenu =showMenu; 
if (document.layers) { 
	document.captureEvents(Event.MOUSEDOWN); 
	document.onmousedown = showMenu; 
}