var oLastBtn=0;
bIsMenu = false;
	
//*************************
// Bloquea el click derecho
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 !=1) 
			return false; 
		} 
	else 
		if (event.button !=1) 
			{ 
			event.cancelBubble = true;
			alert("Click Derecho no permitido.");
			event.returnValue = false; 
			return false; 
			} 
	} 
//-----------------------------------------------------------------------------

document.oncontextmenu = nocontextmenu; 
document.onmousedown = norightclick; 
	
//*************************************************************
//Bloquea F5, Bloquea F11, BackSpace, Alt-BackSpace y comandos de navegación
  
function onKeyDown() 
	{

  	if ( ((event.keyCode == 8) && 
   	(event.srcElement.type != "text" && event.srcElement.type != "textarea" && event.srcElement.type != "imagen" && event.srcElement.type != "password")) ||
	((event.ctrlKey) && ((event.keyCode == 78) || (event.keyCode == 82) || (event.keyCode == 80) || (event.keyCode == 67))) 
	|| (event.keyCode == 116) || (event.keyCode == 122) ) 
		{
        alert("No tiene permisos para ejecutar el comando.");
        event.keyCode = 0;
        event.returnValue = false;
		}
	} 
//-----------------------------------------------------------------------------