JAVASCRIPT - Banner random sin CGI o Java

Banner random

Compatibilidad: Ms Internet Explorer, Netscape
Este script evita que se deban usar CGI o Java para crear banner random en la propia página. Sin necesidad de volver a cargar toda la página, este script visualiza un banner diverso cada 10 segundos. Resaltar que al banner se le asocia un enlace.

[ Muestra el ejemplo práctico ]

el código para insertar en tu página

<TITLE>Ejemplos Javascript: ejemplo práctico </TITLE>

<SCRIPT LANGUAGE="JavaScript">
<!-- Hide from JavaScript-Impaired Browsers
/* First, if you load fewer or more than 6 sponsors
   into your rotator, change the "sponnr" variable
   to the actual number of sponsor .gifs you plan to
   load. */
number_of_sponsors=6;

var sctr=0;
var halt=0;
var isn=new Array();
for (i=0;i<number_of_sponsors;i++){
 isn[i]=new Image();
}

/* The sponsor .gif names are loaded into the isn[x]
   sponsor images array.  You may load any number of
   sponsor images (.gif or .jpg or both) into this
   array. They must all be the same size, however.
   Substitute your own .gif filenames for the ones
   shown here. Note that the first .gif must appear
   in the isn[0] array element. */
isn[0].src="siti_geo.gif";
isn[1].src="siti_har.gif";
isn[2].src="siti_htm.gif";
isn[3].src="siti_mid.gif";
isn[4].src="siti_fol.gif";
isn[5].src="siti_nas.gif";

/* Finally, replace the URL's below with those of
   your sponsors IN THE SAME ORDER. */
var durl=new Array();
durl[0]="http://www.geocities.com/~nicolarandone/geoguide/";
durl[1]="http://www.hwupgrade.com";
durl[2]="http://www.htmlpoint.com";
durl[3]="HTTP://WWW.INTERACTIVA.IT/USERS/MATTEO/MIDILAND/INDEX.HTM";
durl[4]="http://www.geocities.com/SiliconValley/Peaks/5080/";
durl[5]="http://www.pegacity.it/informatica/nasi.com/";

/* This script is set to rotate every 10 seconds.
   (5000=5 seconds, so 30000 would equal 30, etc)
   You should change the number in the setTimeout()
   call below for the number of seconds you wish. */
function rotateIt(){
 if (halt!=1){
  sctr++;
  if (sctr>number_of_sponsors-1){
   sctr=0;
   }
  document.sponsor.src=isn[sctr].src;
  setTimeout("rotateIt()",10000);
  }
 }

/* This code will work just fine with or without
   frames.  However, if you are in frames and wish
   to replicate the TARGET="_top" call to remove
   frames, change the location.href call to:
    parent.location.href=durl[sctr];
   below. */
function doIt(){
 halt=1;
 location.href=durl[sctr];
 }

function dispIt(){
 parent.window.status=durl[sctr];
 }
// End Hiding -->
</SCRIPT>

</HEAD>

<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>

</body>
</html>

[Baja en un único archivo .zip, las imágenes y demás archivos necesarios
para el funcionamiento de las demo de esta sección]