Scrolling layers trouble

[Scragz]

Hi there,

I'm trying to write a script that will scroll a layer up and down the browser. The problem I have is adding a conditional limiter to stop the scrolling before the layer goes off the top of the browser. This is what I have so far and I doesen't seem to work.

var num = 0, timer;

function up() {
num++;
if (num==20){
window.clearTimeout(timer);
}
else if (document.all) test.style.top=parseInt (test.style.top) -1;
else if (document.layers) document.lyr.top -=1;
{timer = window.setTimeout ( "up()", 50);}
}

[Scragz]

No it just carries on scrolling up the screen.

As you can probably tell i'm still in the process of learning javascript so your help is much appreciated.

[Scragz]

I am not really sure if this is the best method to use for what I want to achieve. Basically I have got a small space to put a lot of text so I want to be able to scroll this text up to read it all. And I want to use rollover images to control the scrolling.

[Scragz]

It comes up with various object expected and invalid argument errors when I rollover the button.

[Scragz]

The ID is test.

[Scragz]

Ok i've got it down to one error on line 38.

I've uploaded the page to www.simplyonline.net/test.html

[Scragz]

Ok. I now get the error object expected on line 34.

[Scragz]

Got it working now. Now is it the number after the parseInt line I change to adjust how far it scrolls up?

[Scragz]

Cheers.

One last question what do you have to change to get it to scroll downwards?

[Scragz]

Managed to work out how to scroll down. But now the problem is having a button for up and a button for down. Even though the code for each function is different they both do the same thing. I think it may be because it is returning to the first function or something.
Check the site to see what I mean: www.simplyonline.net/test

[Scragz]

Almost there.

Now I find that when it scrolls to its limit i.e. <50 then you can't scroll down again because the function has returned false i'm guessing. It works fine if you don't scroll to the limits.

[Scragz]

The code is exactly the same as what you displayed but once it scrolls to the limits it won't scroll back.

So if you scroll to the top then you can't scroll it back to the middle.

[Scragz]

Can anyone help with the problem above.

The page the script is located on is: www.simplyonline.net/test