[jQuery] Not working in Firefox (mac) or IE

[Richard McKenna]

Hi everyone,

I have the below piece of code it works perfectly in Chrome, Firefox
(pc) and Safari (mac & pc).

But I can't get it to work in IE 8 or Firefox 3.5.5 on OS X

$('#licenseTerms').scroll(function (){
        var a = $(this).scrollTop() / 15;
        var b = $('#licenseTerms').height();
        //console.log(a);
        //console.log(b);
        if ( a >= b ) {
                $('#acceptLicenseTerms').removeAttr("disabled");
        }
});

#licenseTerms is a div with auto overflow.
#acceptLicenseTerms is a disabled checkbox.

Does anyone have any ideas why it isn't working?

Kind regards,

Richard