function detectBrowser() {
    var ie = document.all != undefined;
    var opera = window.opera != undefined;
    
    if (opera) return 1;
    if (ie) return 2;
    if ((window)&&(window.netscape)&&(window.netscape.security)) {
      if (window.XML) {
        return 1;
      }
      else return 1;
    }
    return 2;      // Si no sabemos que navegador es, devolvemos ie.
 	
  }