can anyone see the problem with this code?

[Antivirus]

Hmm... getting the following error:

Parse error: parse error, expecting `']'' in dirpath\script.php on line 133

on this line of code:

PHP Code:

$title = "\n\t\t<a style=\"float:$stylevar[right]\" href=\"#top\" onclick=\"return toggle_collapse('$collapseid')\"><img id=\"collapseimg_$collapseid\" src=\"$stylevar[imgdir_button]/collapse_tcat$vbcollapse[collapseimg_$collapseid].gif\" alt=\"\" border=\"0\" /></a>\n\t\t$title\n\t"; 


I'm trying to create a set of new functions for printing collapsable tables within the AdminCP. I know i'm just not escaping somethign properly here, but i'm stumped...