aguy123

So I'm making a slide show for a specific page on my website. Here's the slideshow page I'm talking about: http://offsavingtheworld.com/extra
I have the "previous" and "next" buttons worked out:

<button class="w3-btn" onclick="plusDivs(-1)">❮ Prev</button>
<button class="w3-btn" onclick="plusDivs(1)">Next ❯</button>

What I'm trying to create are buttons that show the very first, very last, and a completely random image, if that's even possible. Is this even possible using the code I have here?:

<p><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="http://www.w3schools.com/lib/w3.css"></p>

<div class="w3-content" style="max-width:900px;position:relative">

<img class="mySlides" src="IMG URL" style="width:100%"/><img class="mySlides" src="IMG URL" style="width:100%"/><img class="mySlides" src="IMG URL" style="width:100%"/><img class="mySlides" src="IMG URL" style="width:100%"/><div class="w3-center">
<div class="w3-section">

<button class="w3-btn" onclick="plusDivs(-1)">❮ Prev</button>

<button class="w3-btn" onclick="plusDivs(1)">Next ❯</button>

</div>

</div>

</div>

</div>

<script type=text/javascript>

slideIndex = 1;
showDivs(slideIndex);

function plusDivs(n) {
showDivs(slideIndex += n);
}

function showDivs(n) {

var i;
var x = document.getElementsByClassName("mySlides");
if (n > x.length) {slideIndex = 1}
if (n < 1) {slideIndex = x.length} ;
for (i = 0; i < x.length; i++) {
x.style.display = "none";
}
x[slideIndex-1].style.display = "block";
}
</script>

Sorry if I posted this incorrectly. I'm new to this forum.