Is not define on firefox

I am test some page on firefox , i get  error that is "Is not define on firefox".

some function no define, that is strange. is right on IE.

let me check.
what is i find

    <script src="../JS/thickbox.js" type="text/javascript"></script>

    <script type="text/jsscript" language="javascript">

one is "text/jsscript"    change it to "javascript"

Fixed