Script Combo?? Image popup and viewer

[serunim]

OK i would like to have a script so that when i click on a thumbnail it would show the larger image at the top the page..
I'm not a js pro, or even know any js really but would appreciate it if someone could assist me.
the code for the viewer i found is

http://javascriptkit.com/script/script2/selector.shtml

but instead of there being a text list of pictures i would like the selected image to change when you click on a thumbnail image.

if you could help either post a reply or please email me :)
thank you

[A1ien51]

basic idea

<form name="Pict">
<img src="default.gif" name="Large">
</form>

<img src="Small1.gif" onclick="document.Pict.Large.src='Large1.gif'">

[serunim]

hey thanks a lot.. i really appreciate it.