var BrowserDetect = {
       init: function () {
          this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
          this.version = this.searchVersion(navigator.userAgent)
             || this.searchVersion(navigator.appVersion)
             || "an unknown version";
          this.OS = this.searchString(this.dataOS) || "an unknown OS";
       },
    searchString: function (data) {
       for (var i=0;i<data.length;i++) {
          var dataString = data[i].string;
          var dataProp = data[i].prop;
          this.versionSearchString = data[i].versionSearch || data[i].identity;
          if (dataString) {
             if (dataString.indexOf(data[i].subString) != -1)
                return data[i].identity;
          }
          else if (dataProp)
          return data[i].identity;
       }
    },
    searchVersion: function (dataString) {
       var index = dataString.indexOf(this.versionSearchString);
       if (index == -1) return;
       return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
    },
    dataBrowser: [
       { string: navigator.userAgent,
          subString: "OmniWeb",
          versionSearch: "OmniWeb/",
          identity: "OmniWeb"
       },
    {
       string: navigator.vendor,
       subString: "Apple",
       identity: "Safari"
    },
    {
       prop: window.opera,
       identity: "Opera"
    },
    {
       string: navigator.vendor,
       subString: "iCab",
       identity: "iCab"
    },
    {
       string: navigator.vendor,
       subString: "KDE",
       identity: "Konqueror"
    },
    {
       string: navigator.userAgent,
       subString: "Firefox",
       identity: "Firefox"
    },
    {
       string: navigator.vendor,
       subString: "Camino",
       identity: "Camino"
    },
    { // for newer Netscapes (6+)
       string: navigator.userAgent,
       subString: "Netscape",
       identity: "Netscape"
    },
    {
       string: navigator.userAgent,
       subString: "MSIE",
       identity: "Explorer",
       versionSearch: "MSIE"
    },
    {
       string: navigator.userAgent,
       subString: "Gecko",
       identity: "Mozilla",
       versionSearch: "rv"
    },
    { // for older Netscapes (4-)
       string: navigator.userAgent,
       subString: "Mozilla",
       identity: "Netscape",
       versionSearch: "Mozilla"
    }
    ],
    dataOS : [
    {
       string: navigator.platform,
       subString: "Win",
       identity: "Windows"
    },
    {
       string: navigator.platform,
       subString: "Mac",
       identity: "Mac"
    },
    {
       string: navigator.platform,
       subString: "Linux",
       identity: "Linux"
    }
]

};
BrowserDetect.init();

//script para poner estilos distintos para cada navegador
if (BrowserDetect.browser == "Explorer" && BrowserDetect.version >= 7) {
	document.write("<LINK REL='stylesheet' HREF='http://stc.sand.msn-int.com/br/intl/ES/viajes/sanpatricio/css/especiales7.css' TYPE='text/css'>");
} else {
	document.write("<LINK REL='stylesheet' HREF='http://stc.sand.msn-int.com/br/intl/ES/viajes/sanpatricio/css/especiales.css' TYPE='text/css'>");
}

<!-- Carrusel de imágenes -->

var imgdir = 'http://stc.sand.msn-int.com/br/intl/ES/viajes/sanpatricio/img/photogallery/';
var lista = new Array('sp002.jpg', 'sp003.jpg', 'sp006.jpg', 'sp007.jpg', 'sp015.jpg', 'sp017.jpg', 'sp019.jpg', 'sp026.jpg', 'sp027.jpg', 'sp028.jpg', 'sp029.jpg', 'sp035.jpg');
var contador = 0;
var tiempo = 0;
var tempor = null;

// Creo el carrusel
if (document.getElementById('qleft1')) {
	document.getElementById('qleft1').innerHTML = "<table width='417' border='0' cellpadding='0' cellspacing='0' id='gallerytable'><tr><td colspan='2' id='gallerytd'><img id='galleryimg' src='" + imgdir + "sp002.jpg' border='0' /></td></tr><tr><td width='200' height='17'><a href='javascript:cambio(-1)' id='goforo'>< Anterior</a></td><td width='219' align='right'><a href='javascript: cambio(1);' id='goforo'>Siguiente ></a></td></table>";

	function cambio(sen) {
		contador+= sen;
		if (contador == lista.length)
			contador = 0;
		else
			if (contador < 0) contador = lista.length-1;
				document.images.galleryimg.src = imgdir + lista[contador]
	}
}