// Funciones básicas para el tratamiento de Capas, para los navegadores Ns 4.* Ie4.* Ie5+ Ns6+ Mozilla...

// Sniffer, Último sniffer oficial bajado de http://developer.netscape.com/evangelism

 // convert all characters to lowercase to simplify testing
    var agt=navigator.userAgent.toLowerCase();

    // *** BROWSER VERSION ***
    // Note: On IE5, these return 4, so use is_ie5up to detect IE5.
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);

    // Note: Opera and WebTV spoof Navigator.  We do strict client detection.
    // If you want to allow spoofing, take out the tests for opera and webtv.
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
    var is_nav2 = (is_nav && (is_major == 2));
    var is_nav3 = (is_nav && (is_major == 3));
    var is_nav4 = (is_nav && (is_major == 4));
    var is_nav4up = (is_nav && (is_major >= 4));
    var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) ||
                          (agt.indexOf("; nav") != -1)) );
    var is_nav6 = (is_nav && (is_major == 5));
    var is_nav6up = (is_nav && (is_major >= 5));
    var is_gecko = (agt.indexOf('gecko') != -1);


    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    var is_ie3    = (is_ie && (is_major < 4));
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
    var is_ie4up  = (is_ie && (is_major >= 4));
    var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
    var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
    var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
    var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
    var is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );
    var is_ie6up  = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);

    // KNOWN BUG: On AOL4, returns false if IE3 is embedded browser
    // or if this is the first browser window opened.  Thus the
    // variables is_aol, is_aol3, and is_aol4 aren't 100% reliable.
    var is_aol   = (agt.indexOf("aol") != -1);
    var is_aol3  = (is_aol && is_ie3);
    var is_aol4  = (is_aol && is_ie4);
    var is_aol5  = (agt.indexOf("aol 5") != -1);
    var is_aol6  = (agt.indexOf("aol 6") != -1);

    var is_opera = (agt.indexOf("opera") != -1);
    var is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
    var is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
    var is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
    var is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
    var is_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);

    var is_webtv = (agt.indexOf("webtv") != -1); 

    var is_TVNavigator = ((agt.indexOf("navio") != -1) || (agt.indexOf("navio_aoltv") != -1)); 
    var is_AOLTV = is_TVNavigator;

    var is_hotjava = (agt.indexOf("hotjava") != -1);
    var is_hotjava3 = (is_hotjava && (is_major == 3));
    var is_hotjava3up = (is_hotjava && (is_major >= 3));


	// Añadido por Isi...
		var is_dom = (is_gecko || is_ie5up || is_opera5up || is_nav6up);


// Instrucciones Necesarias para que al Variar de Tamaño el navegador haga un reload...

function recargar() { window.location.reload(); }
if (is_nav4) { window.captureEvents(Event.RESIZE); window.onresize=recargar;}

// Función pillada del Dreamweaver de Macromedia ...

function encontrar(n, d) { //v3.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=encontrar(n,d.layers[i].document); return x;
}

function estilo(id) {
	if (!is_dom) { ref=encontrar(id); if (is_ie4) {return ref.style} else if (is_nav4) {return ref} }
	else { return document.getElementById(id).style; }
	}

function referenciar(id) {
	if (!is_dom) {return encontrar(id); }
	else {return document.getElementById(id); }
	}

function posicionar(id,x,y) { id=estilo(id); id.top=y; id.left=x; return false;}
function color(id,color) { id=estilo(id);  if (is_ie4up || is_dom) {id.background=color; } else if (is_nav4up) {id.bgColor=color} return false; }
function visibilidad(id,v) { id=estilo(id); vis=v?"inherit":"hidden"; id.visibility=vis; }
function zindex(id,z) { id=estilo(id); id.zIndex=z; }
function clipear(id,x1,x2,y1,y2) {
	id=estilo(id);
	if (is_nav4up) { id.clip.top=y1; id.clip.bottom=y2; id.clip.left=x2; id.clip.right=x1; }
	else { id.clip='rect('+y1+','+x1+','+y2+','+x2+')'; }
	}
function escribir(navid,navtxt) {
	navid=referenciar(navid);
	if (is_ie4up || is_nav6up || is_opera5up || is_gecko) { navid.innerHTML=navtxt; }
	else if (is_nav4) {
			navid.document.open();
			navid.document.write(navtxt);
			navid.document.close();
			}
	}