Is there a way to have a small button somewhere near the image that moves forward/backward in Javascript? This is what I have so far.

<script type="text/javascript">

var image1=new Image()
image1.src="images/get_involved_images/im1.jpg"
var image2=new Image()
image2.src="etc"

[etc].

//-->
</script>
<img src="default.jpg" name="slide" width="auto" height="auto" />
<script>
<!--
//variable that will increment through the images
var step=1
function slideshow(){

if (!document.images)
return
document.images.slide.src=eval("image"+step+".src" )
if (step<5) //number reflect # of slide
step++
else
step=1 //return to first pic
setTimeout("slideshow()",2500)
}
slideshow()
//-->
</script>