Stò usando uno script per l'effetto dissolvenza al cambio immagini (esempio) che però nel browser Firefox non funziona: le immagini cambiano e basta senza dissolvenza.

Si può modificare alla bisogna... o meglio che ne trovi un'altro (consigli graditi nel caso )?

Eccolo:


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Script: JavaScript Cross-Browser SlideShow Script
With Cross-Fade Effect between Images
Adjustable Timing and Unlimited Images
Function: Displays images continuously in a slideshow
presentation format, with a fade effect on
image transitions.
Browsers: All common browsers: NS3-6, IE 4-6
Fade effect only in IE; others degrade gracefully
Author: etLux
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Step 1.
Put the following script in the head of your page:

<script>
// (C) 2000 www.CodeLifter.com
// http://www.codelifter.com
// Free for all users, but leave in this header
// NS4-6,IE4-6
// Fade effect only in IE; degrades gracefully

// =======================================
// set the following variables
// =======================================

// Set slideShowSpeed (milliseconds)
var slideShowSpeed = 5000

// Duration of crossfade (seconds)
var crossFadeDuration = 3

// Specify the image files
var Pic = new Array() // don't touch this
// to add more images, just continue
// the pattern, adding to the array below

Pic[0] = '1.jpg'
Pic[1] = '2.jpg'
Pic[2] = '3.jpg'
Pic[3] = '4.jpg'
Pic[4] = '5.jpg'

// =======================================
// do not edit anything below this line
// =======================================

var t
var j = 0
var p = Pic.length

var preLoad = new Array()
for (i = 0; i < p; i++){
preLoad[i] = new Image()
preLoad[i].src = Pic[i]
}

function runSlideShow(){
if (document.all){
document.images.SlideShow.style.filter="blendTrans (duration=2)"
document.images.SlideShow.style.filter="blendTrans (duration=crossFadeDuration)"
document.images.SlideShow.filters.blendTrans.Apply ()
}
document.images.SlideShow.src = preLoad[j].src
if (document.all){
document.images.SlideShow.filters.blendTrans.Play( )
}
j = j + 1
if (j > (p-1)) j=0
t = setTimeout('runSlideShow()', slideShowSpeed)
}
</script>
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Step 2.
Put this onload event call in your body tag:

<body onload="runSlideShow()">

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Step 3.
Put this in the body of your page where you want the
slide show to appear.

Set widths and heights same as images
Set image file same as first image in array Pic[] (above)

<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td id="VU" height=150 width=150>
[img]1.jpg[/img]</td>
</tr>
</table>

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Grazie 1000