Halo Scroll Actionscript

Question

Hello, I am having a small problem with the Halo scroll bar.
I am using this code(below) to controll the scrolling. The
scrollbar graphic is going beyond the track mc on the "up" press
and not going to the end of the track on the "down" press. Any help
would be greatly appreciated. Thank you
on (keyPress "<Up>") {
theText.scroll--;
scrollAmt = (theText.scroll-1)/theText.maxscroll;
scrollHeight = sb_mc.track_mc._height -
sb_mc.thumb_mc._height;
sb_mc.thumb_mc._y = int(scrollHeight*scrollAmt);
on (keyPress "<Down>") {
theText.scroll++;
scrollAmt = (theText.scroll-1)/theText.maxscroll;
scrollHeight = sb_mc.track_mc._height -
sb_mc.thumb_mc._height;
sb_mc.thumb_mc._y = int(scrollHeight *scrollAmt);

Answer 1

Actually, I'm getting the following errors. I tried changing
0 to NaN. Didn't work. Any other ideas?
Thanks for your help!.
**Error** Symbol=scroll down button, layer=Layer 1,
frame=1:Line 3: Unexpected '.' encountered
../:loopEnabled = 0;
**Error** Symbol=scroll down button, layer=Layer 1,
frame=1:Line 4: Statement must appear within on handler
tellTarget ("../") {
**Error** Symbol=scroll down button, layer=Layer 1,
frame=1:Line 7: Unexpected '}' encountered
**Error** Symbol=scroll up button, layer=Layer 1,
frame=1:Line 3: Unexpected '.' encountered
../:loopEnabled = 0;
**Error** Symbol=scroll up button, layer=Layer 1,
frame=1:Line 4: Statement must appear within on handler
tellTarget ("../") {
**Error** Symbol=scroll up button, layer=Layer 1,
frame=1:Line 7: Unexpected '}' encountered
**Error** Symbol=clip scroll knob, layer=Layer 1,
frame=1:Line 2: Operator '+' must be followed by an operand
startDrag("", false, getProperty("", _x),
Number(getProperty("../scroll_track",
_y))+Number(../:scrollTrackPadding), getProperty("", _x),
Number(Number(getProperty("../scroll_track",
_y))+Number(../:scrollTrackPadding))+Number(../:travelLength));
**Error** Symbol=clip scroll knob, layer=Layer 1,
frame=1:Line 3: ')' or ',' expected
tellTarget ("../") {
**Error** Symbol=clip scroll knob, layer=Layer 1,
frame=1:Line 6: Unexpected '}' encountered
Total ActionScript Errors: 9 Reported Errors: 9