var sBrowser	= "";
var sVersion	= "";
var scrWidth	= screen.width;
var scrHeight	= screen.height;
var ntop			= 0;
var nleft		= 0;
var nwidth		= 0;
var pars			= "";

function ctlNavega(ctp)
	{
	var aBrowFull = new Array("opera", "msie", "netscape", "gecko", "mozilla");
	var aBrowVers = new Array("opera", "msie", "netscape", "rv",    "mozilla");
	var aBrowAbrv = new Array("op",    "ie",   "ns",       "mo",    "ns");
	var sInfo = navigator.userAgent.toLowerCase();;

	sBrowser = "";
	for (var i = 0; i < aBrowFull.length; i++){
	if ((sBrowser == "") && (sInfo.indexOf(aBrowFull[i]) != -1))
		{
		sBrowser = aBrowAbrv[i];
		sVersion = String(parseFloat(sInfo.substr(sInfo.indexOf(aBrowVers[i]) + aBrowVers[i].length + 1)));
		}
	}

	// Validar navegador, solo Firefox y Explorer >= version 6
	if ( sBrowser != "mo" && sBrowser != "ie" )
		{
		parent.location.replace(ctp+"/html/navega_err.jsp");
		return false;
		}
	if ( sBrowser == "ie" && sVersion < 6 )
		{
		parent.location.replace(ctp+"/html/navega_err.jsp");
		return false;
		}

	// Asignar dimensiones segun navegador
	if ( scrWidth > 800 ) nleft= (scrWidth-800) /2
	if ( scrHeight > 600 ) ntop= (scrHeight-600) /2

	nwidth = 790;
	if ( sBrowser == "mo" )
		{
		nwidth = 795;
		}

	pars="left="+nleft+",top="+ntop+",width="+nwidth+",height=540,resizable=0,maximixed=0,status=1"

	return true;
	}