javascript: html page array with an iframe

[Epsilon]

I read an earlier post about paging through some html pages using an array in javascript, but I was unable to find the post again. However, this is what I have:

<script type="text/javascript">
var x = 0;
var midpage = new Array("adtable.html", "nothing.html", "nothing.html");
function changePage()
{
	var y = "";
	document.getElementById('adtable') = y;
	if (x==2)
	{
		x = 0;
	} else {
		x = x + 1;
	}
	y.src = midpage[x];
}
</script>

and then my IFrame:

<iframe id="adtable" name="adtable" src="adtable.html" height=202 align="center" width="100%" marginheight=0 marginwidth=0 scrolling="no" frameborder=0>
NO WORKY!!!
</iframe>

When I click one of these buttons:

<a class="inline-button" onClick="changePage()">Right</a>

Nothing happens.
By the way, I am testing this in the newest version of Firefox.
Any help is appriciated, sorry if this is double post.

[Deadeye]

do you have a link that I can see the current code in action? It would really help to help solve the problem.

Also, what is the point of that if statement in the JS code?

Wesley

[Epsilon]

I don't have the code live. I'm just testing it on a localhost server. But the point of the if statement is so that when you are cycling through the array the x used will not cause the array to go out of bounds.

[curtiss]

I think you have this statement written backwards:

document.getElementById('adtable') = y;

I believe it should be:

y = document.getElementById('adtable');

Also, rather than performing the if statement the way you have it, try doing it this way instead:

	if (x>=midpage.length)
	{
		x = 0;
	} else {
		x = x + 1;
	}
	y.src = midpage[x];

That should mean that you don't have to physically count the number of the items in your midpage array. Just be sure to leave it as ">=" as opposed to just ">", as your array "length" is always going to be 1 number greater than your highest index (being that the "length" is an actual count of the items in the array, and your indexes are zero-based).

[Epsilon]

Ah yes ">=". Thanks for the help, I'll try it out. Though I was coding a smaller version the other day. Something like this

// js file
//array
var midpage = new Array();
midpage[0] = "Show";
midpage[1] = "Me";
midpage[2] = "The";
midpage[3] = "Money";
//globals
var x = 0;
var box = getElementByID('testbox');
function changeWord()
{
  if (x==3)
  {
    x = 0;
    box.value = midpage[x];
  } else {
    box.value = midpage[x];
    x++;
  }
}

And then I had a button (that worked when I put an alert() into the onclick) that would do changeWord() onclick and a textbox input with the id and name of testbox, but the function for some reason still wouldn't work. I can't figure it out.