scrollByLine, scrollTop question

[manfishj]

Hi,
I'm having trouble. The script below enables the
user to input a word, then click a button which will search a scrollable text field and then highlight the occurrence of the word that the user typed in. What I need it to do is, if this word is on a part of the text field
that is not visible, I need it to automatically scroll up or down to make the highlighted word visible. As someone suggested, it seems that I should use scrollByLine or scrollTop. However, I'm having trouble figuring out the conditions. How do I note which part of the text field is currently visible? Can anyone
steer me in the right direction? Thanks.
Jon

on mouseUp

wordSearch = member ("searchWord&quot.text

pMemRef = sprite (4).member

tempStr = member("pMemRef&quot.text

hiliteList = []

counter = 0

repeat while offset (wordSearch, tempStr)

startChar = offset (wordSearch, tempStr)

endChar = startChar + wordSearch.char.count - 1

hiliteList.append ([counter + startChar, counter + endChar])

delete char 1 to endChar of tempStr

counter = counter + endChar

end repeat
pMemRef.color = color (#rgb, 0, 0, 0)

repeat with i in hiliteList

pMemRef.char[i[1]..i[2]].color = color (#rgb, 255, 0, 0)

end repeat


end