function volver() {
	if (navigator.appName == "Netscape") 
		window.back();
	else
		history.back();
}


if (self == top) // anti-hijacking frame buster code
	top.location.replace('../../default.htm');

function frameJammer_hp(){
	var framedPage = location.search;
	if (framedPage.length > 1){
		framedPage = framedPage.substring(1);
		var theSplit = framedPage.indexOf('~');
		var thePage = framedPage.substring(0,theSplit);
		var theFrame = framedPage.substring(theSplit+1);
		eval("top."+ theFrame+".location.replace('"+ thePage+"')");
		}
	}
// optional special handling for IE < 4/Mac
// if you don't care, just delete the following
var agt = navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_iemacdud = (agt.indexOf('msie')!=-1) && (agt.indexOf('mac')!=-1) && (is_major<4);
if (is_iemacdud) setTimeout('frameJammer_hp()',15); 

<!-- 
function keypressed() {
alert("Invalid Option");
}

function right(e) {
if (navigator.appName == 'Netscape' && 
(e.which == 3 || e.which == 2)) {
document.onmouseup = function (evt) {if (evt.button == 3) event.preventDefault();  }
return false;}
else if (navigator.appName == 'Microsoft Internet Explorer' && 
(event.button == 2 || event.button == 3)) {
 document.oncontextmenu =  function () { return false; };
return false;
}
return true;
}

document.onkeydown=keypressed;
document.onmousedown=right;
document.onmouseup=right;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
if (document.layers) window.captureEvents(Event.MOUSEUP);
window.onmousedown=right;
window.onmouseup=right;
//  End -->