It looks like the css path was converted to a file:// path at some point. It has:
<link href="file:///Macintosh HD/Applications/MAMP/htdocs/websites/delta-sds-903/webassist/forms/dataassist_button.css" rel="stylesheet" type="text/css" />
but it should be:
<link href="../webassist/forms/dataassist_button.css" rel="stylesheet" type="text/css" />
Did you mean for those to be multi-select lists? Or should users only be making one selection?