Cara membuat slideshow

<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
var rotate_delay = 5000; // delay in milliseconds (5000 = 5 secs)
current = 0;
function next() {
if (document.slideform.slide[current+1]) {
document.images.show.src = document.slideform.slide[current+1].value;
document.slideform.slide.selectedIndex = ++current;
   }
else first();
}
function previous() {
if (current-1 >= 0) {
document.images.show.src = document.slideform.slide[current-1].value;
document.slideform.slide.selectedIndex = --current;
   }
else last();
}
function first() {
current = 0;
document.images.show.src = document.slideform.slide[0].value;
document.slideform.slide.selectedIndex = 0;
}
function last() {
current = document.slideform.slide.length-1;
document.images.show.src = document.slideform.slide[current].value;
document.slideform.slide.selectedIndex = current;
}
function ap(text) {
document.slideform.slidebutton.value = (text == "Stop") ? "Start" : "Stop";
rotate();
}
function change() {
current = document.slideform.slide.selectedIndex;
document.images.show.src = document.slideform.slide[current].value;
}
function rotate() {
if (document.slideform.slidebutton.value == "Stop") {
current = (current == document.slideform.slide.length-1) ? 0 : current+1;
document.images.show.src = document.slideform.slide[current].value;
document.slideform.slide.selectedIndex = current;
window.setTimeout("rotate()", rotate_delay);
   }
}
//  End -->
</script>

<center>
<form name=slideform>
<tr>
<td align=center bgcolor="white">
<b>Image Slideshow</b>
</td>
</tr>
<div style="border: 1px solid #ccc; padding-top: 10px; margin: 3px;
overflow: auto; 
width: 350px; 
height: 130px;
">
<tr>
<td align=center bgcolor="white">
<img src="images1.jpg" name="show">
</td>
</tr>
</div>
<table cellspacing=1 cellpadding=4 bgcolor="#000000">
<tr>
<td align=center bgcolor="#C0C0C0">
<select name="slide" onChange="change();">
<option value="images1.jpg" selected>Gambar 1
<option value="images2.jpg">Gambar 2
<option value="images3.jpg">Gambar 3
</select>
 
<input type=button onClick="first();" value="|<<" title="Beginning">
 
<input type=button onClick="previous();" value="<<" title="Previous">
<input type=button name="slidebutton" onClick="ap(this.value);" value="Start" title="AutoPlay">
<input type=button onClick="next();" value=">>" title="Next">
<input type=button onClick="last();" value=">>|" title="End">
</td>
 
</tr>
</table>
</form>
</center>