1) Script Title: Ultimate Fade-in Slideshow

2) Script URL (on DD): http://www.dynamicdrive.com/dynamici...nslideshow.htm

3) Describe problem: I have several dozen pages that use this script. Here is an example: https://wildadirondacks.org/adironda...ve-center.html

The slide show works fine, but when I do a Google Lighthouse mobile audit, I get a very low accessibility rating (69). One of the problems that Lighthouse found: "Image elements do not have alt attributes."

In fact, however, all of the images in the slide show already have alt attributes, but Lighthouse seems to be telling me that they are not working.

Here is the relevant code:

Code:
<style>

#fadeshow4{
overflow: auto;
width:  80%;
margin: 0 auto;
		border-radius: 7px;
}

#fadeshow4 .gallerylayer img{ /* make all images inside fadeshow4 scale to 100% of slideshow width */
width: 100%;
height: auto;
max-width: 540px !important;
margin: 0 auto;

}

.descpanelfg {
	text-align: center;
}

.prev { 
    float:left;
	display:inline;
	margin-top:10px;
	margin-right: 10px;
}
.next { 
    float:right;
	display:inline; 
	margin-top:10px;
	margin-left: 10px;
} 
.status { 
	display:inline; 
	margin-top:10px;

}

#slideshowtoggler .noscript {
	display: none;
	font: bold 70% Arial, Helvetica, sans-serif;
}
</style>

<noscript>
<style>
#fadeshow4 {
	overflow: auto;
	width: 100%;

}
#fadeshow4 img {
	display: block;

}
#slideshowtoggler * {
	display: none;

}
#slideshowtoggler .noscript {
	display: inline;
}
</style>
</noscript>
<style>

@media screen and (max-width: 350px){
#fadeshow4{
height: 250px !important;
}
}

@media screen and (min-width: 351px) and (max-width: 600px){
#fadeshow4{
height: 350px !important;
}
}
@media screen and (min-width: 601px) and (max-width: 800px){
#fadeshow4{
height: 375px !important;
}
}
	

@media screen and (min-width: 801px)and (max-width: 1200px){
#fadeshow4{
height: 400px !important;
}
}

@media screen and (min-width: 1201px) and (max-width: 1400px){
#fadeshow4{
height: 410px !important;
}
}

@media screen and (min-width: 1401px){
#fadeshow4{
height: 411px !important;
}
}
</style>


<script src="fadeslideshow.js">

//***********************************************
//* Ultimate Fade In Slideshow v2.0- (c) Dynamic Drive DHTML code library (www.dynamicdrive.com)
//* Please keep this notice intact
//* Visit Dynamic Drive at http://www.dynamicdrive.com/ for this script and 100s more
//***********************************************/*********************************************/

</script>

<script>

var mygallery3=new fadeSlideShow({
	wrapperid: "fadeshow4", //ID of blank DIV on page to house Slideshow
	dimensions: ['100%', 411], //width/height of gallery in pixels. Should reflect dimensions of largest image
	
	imagearray: 
	[
	
		["images/Adirondack-Interpretive-Center-1.jpg", "", "", "Adirondack Nature Trails: Rich Lake from the Rich Lake Trail (14 August 2017)"],
		["images/Adirondack-Interpretive-Center-2.jpg", "", "", "Adirondack Ferns: Long Beech Fern (Phegopteris connectilis) on the Sucker Brook Trail (5 August 2018)"],
		["images/Adirondack-Interpretive-Center-3.jpg", "", "", "Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)"],
		["images/Adirondack-Interpretive-Center-4.jpg", "", "", "Adirondack Wildflowers: Helleborine  (Epipactis helleborine) on the Sucker Brook Trail (5 August 2018)"],	
		["images/Adirondack-Interpretive-Center-5.jpg", "", "", "Adirondack Wildflowers: Cardinal Flower (Lobelia cardinalis) on the Rich Lake Trail (5 August 2018)"],
		["images/Adirondack-Interpretive-Center-6.jpg", "", "", "Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)"],
		["images/Adirondack-Interpretive-Center-7.jpg", "", "", "Adirondack Wildflowers:  Indian Pipe (Monotropa uniflora) on the Sucker Brook Trail (5 August 2018)"],
		["images/Adirondack-Interpretive-Center-8.jpg", "", "", "Adirondack Wildflowers:  White Water-lily (Nymphaea odorata) on the Sucker Brook Trail (5 August 2018)"],
		["images/Adirondack-Interpretive-Center-9.jpg", "", "", "Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)"],
		["images/Adirondack-Interpretive-Center-10.jpg", "", "", "Adirondack Wildflowers:  Wintergreen (Gaultheria procumbens) on the Sucker Brook Trail (5 August 2018)"],
		["images/Adirondack-Interpretive-Center-11.jpg", "", "", "Adirondack Wildflowers:  Swamp Candles (Lysimachia terrestris) on the Sucker Brook Trail (5 August 2018)"],
		["images/Adirondack-Interpretive-Center-12.jpg", "", "", "Adirondack Butterflies: Red Admiral at the Adirondack Interpretive Center butterfly garden (14 August 2017)"],
		["images/Adirondack-Interpretive-Center-13.jpg", "", "", "Adirondack Butterflies: Monarch at the Adirondack Interpretive Center butterfly garden (5 August 2018)"],
		["images/Adirondack-Interpretive-Center-14.jpg", "", "", "Adirondack Nature Trails: Boardwalk through a cedar swamp on the Rich Lake Trail (5 August 2018)"]//<--no trailing comma after very last image element!

],
	titlesAndAlts: [
	
{title:  "Adirondack Nature Trails: Rich Lake from the Rich Lake Trail (14 August 2017)", alt: "Adirondack Nature Trails: Rich Lake from the Rich Lake Trail (14 August 2017)"},

{title:  "Adirondack Ferns: Long Beech Fern (Phegopteris connectilis) on the Sucker Brook Trail (5 August 2018)", alt: "Adirondack Ferns: Long Beech Fern (Phegopteris connectilis) on the Sucker Brook Trail (5 August 2018)"},

{title:  "Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)", alt: "Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)"},

{title:  "Adirondack Wildflowers: Helleborine  (Epipactis helleborine) on the Sucker Brook Trail (5 August 2018)", alt: "Adirondack Wildflowers: Helleborine  (Epipactis helleborine) on the Sucker Brook Trail (5 August 2018)"},

{title:  "Adirondack Wildflowers: Cardinal Flower (Lobelia cardinalis) on the Rich Lake Trail (5 August 2018)", alt: "Adirondack Wildflowers: Cardinal Flower (Lobelia cardinalis) on the Rich Lake Trail (5 August 2018)"},

{title:  "Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)", alt: "Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)"},

{title:  "Adirondack Wildflowers:  Indian Pipe (Monotropa uniflora) on the Sucker Brook Trail (5 August 2018)", alt: "Adirondack Wildflowers:  Indian Pipe (Monotropa uniflora) on the Sucker Brook Trail (5 August 2018)"},

{title:  "Adirondack Wildflowers:  White Water-lily (Nymphaea odorata) on the Sucker Brook Trail (5 August 2018)", alt: "Adirondack Wildflowers:  White Water-lily (Nymphaea odorata) on the Sucker Brook Trail (5 August 2018)"},

{title:  "Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)", alt: "Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)"},

{title:  "Adirondack Wildflowers:  Wintergreen (Gaultheria procumbens) on the Sucker Brook Trail (5 August 2018)", alt: "Adirondack Wildflowers:  Wintergreen (Gaultheria procumbens) on the Sucker Brook Trail (5 August 2018)"},

{title:  "Adirondack Wildflowers:  Swamp Candles (Lysimachia terrestris) on the Sucker Brook Trail (5 August 2018)", alt: "LAdirondack Wildflowers:  Swamp Candles (Lysimachia terrestris) on the Sucker Brook Trail (5 August 2018)"},

{title:  "Adirondack Butterflies: Red Admiral at the Adirondack Interpretive Center butterfly garden (14 August 2017)", alt: "Adirondack Butterflies: Red Admiral at the Adirondack Interpretive Center butterfly garden (14 August 2017)"},

{title:  "Adirondack Butterflies: Monarch at the Adirondack Interpretive Center butterfly garden (5 August 2018)", alt: "Adirondack Butterflies: Monarch at the Adirondack Interpretive Center butterfly garden (5 August 2018)"},

{title:  "Adirondack Butterflies: Monarch at the Adirondack Interpretive Center butterfly garden (5 August 2018)", alt: "Adirondack Butterflies: Monarch at the Adirondack Interpretive Center butterfly garden (5 August 2018)"},




	],
	displaymode: {type:'auto', pause:3000, cycles:0, wraparound:false},
	persist: false, //remember last viewed slide and recall within same session?
	fadeduration: 500, //transition duration (milliseconds)
	descreveal: "always",
	togglerid: "slideshowtoggler"
	

})
</script>
And here is the relevant HTML code:

Code:
<div id="fadeshow4">
	<img src="images/Adirondack-Interpretive-Center-1.jpg" title ="Adirondack Nature Trails: Rich Lake from the Rich Lake Trail (14 August 2017)" alt="Adirondack Nature Trails: Rich Lake from the Rich Lake Trail (14 August 2017)">   
	<img src="images/Adirondack-Interpretive-Center-2.jpg" title ="Adirondack Ferns: Long Beech Fern (Phegopteris connectilis) on the Sucker Brook Trail (5 August 2018)" alt="Adirondack Ferns: Long Beech Fern (Phegopteris connectilis) on the Sucker Brook Trail (5 August 2018)">  
	<img src="images/Adirondack-Interpretive-Center-3.jpg" title ="Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)" alt="Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)">   
	<img src="images/Adirondack-Interpretive-Center-4.jpg" title ="Adirondack Wildflowers: Helleborine  (Epipactis helleborine) on the Sucker Brook Trail (5 August 2018)" alt="Adirondack Wildflowers: Helleborine  (Epipactis helleborine) on the Sucker Brook Trail (5 August 2018)">  
	<img src="images/Adirondack-Interpretive-Center-5.jpg" title ="Adirondack Wildflowers: Cardinal Flower (Lobelia cardinalis) on the Rich Lake Trail (5 August 2018)" alt="Adirondack Wildflowers: Cardinal Flower (Lobelia cardinalis) on the Rich Lake Trail (5 August 2018)">  
	<img src="images/Adirondack-Interpretive-Center-6.jpg" title ="Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)" alt="Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)">  
	<img src="images/Adirondack-Interpretive-Center-7.jpg" title ="Adirondack Wildflowers:  Indian Pipe (Monotropa uniflora) on the Sucker Brook Trail (5 August 2018)" alt="Adirondack Wildflowers:  Indian Pipe (Monotropa uniflora) on the Sucker Brook Trail (5 August 2018)">  
	<img src="images/Adirondack-Interpretive-Center-8.jpg" title ="Adirondack Wildflowers:  White Water-lily (Nymphaea odorata) on the Sucker Brook Trail (5 August 2018)" alt="Adirondack Wildflowers:  White Water-lily (Nymphaea odorata) on the Sucker Brook Trail (5 August 2018)">  
	<img src="images/Adirondack-Interpretive-Center-9.jpg" title ="Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)" alt="Adirondack Nature Trails: Sucker Brook Trail at the Adirondack Interpretive Center (5 August 2018)">  
	<img src="images/Adirondack-Interpretive-Center-10.jpg" title ="Adirondack Wildflowers:  Wintergreen (Gaultheria procumbens) on the Sucker Brook Trail (5 August 2018)" alt="Adirondack Wildflowers:  Wintergreen (Gaultheria procumbens) on the Sucker Brook Trail (5 August 2018)">  
	<img src="images/Adirondack-Interpretive-Center-11.jpg" title ="Adirondack Wildflowers:  Swamp Candles (Lysimachia terrestris) on the Sucker Brook Trail (5 August 2018)" alt="Adirondack Wildflowers:  Swamp Candles (Lysimachia terrestris) on the Sucker Brook Trail (5 August 2018)">  
	<img src="images/Adirondack-Interpretive-Center-12.jpg" title ="Adirondack Butterflies: Red Admiral at the Adirondack Interpretive Center butterfly garden (14 August 2017)" alt="Adirondack Butterflies: Red Admiral at the Adirondack Interpretive Center butterfly garden (14 August 2017)">  
	<img src="images/Adirondack-Interpretive-Center-13.jpg" title ="Adirondack Butterflies: Monarch at the Adirondack Interpretive Center butterfly garden (5 August 2018)" alt="Adirondack Butterflies: Monarch at the Adirondack Interpretive Center butterfly garden (5 August 2018)">  
	<img src="images/Adirondack-Interpretive-Center-14.jpg" title ="Adirondack Nature Trails: Boardwalk through a cedar swamp on the Rich Lake Trail (5 August 2018)" alt="Adirondack Nature Trails: Boardwalk through a cedar swamp on the Rich Lake Trail (5 August 2018)">  
  
    </div>
    
<div id="slideshowtoggler" style="width:70%; text-align:center; margin: 0 auto; margin-top:10px">
<span class="noscript">You have JavaScript turned off in your browser. To view the slideshow, please enable JavaScript.  Instructions may be found here: www.enable-javascript.com </span> 

<a href="#" class="prev"><img src="images/left.png" alt="left" style="border-width:0" /></a>  <span class="status" style="margin:0 50px; font-size:.85em; font-weight:bold"></span> <a href="#" class="next"><img src="images/right.png" alt="right" style="border-width:0" /></a>
</div>
As you can see, I have included alts and titles for all the images in the slide show, following jscheuer1's excellent recommendations back in 2012 (when I first started using this script). However, my alts do not seem to be recognized by Lighthouse, implying that screen readers would not recognize them either.

Please help!

Thanks! ellen