magic jquery image uploading?

magic jquery image uploading?

I'm trying to make someone else's code work for iPad (and other mobile
devices). One of the things that works on desktop but that fails on iPad
is clicking the 'import image' button. On the desktop, it opens the
dialogue box you'd expect and allows you to select an image, but on iPad
clicking 'import image' does nothing.
The only code I can find that is called in response to clicking this
button is as follows:
var clickImport = function() {
//breakpoint here hits when I write something like "var test=9;" and
'import image' is clicked
};
Nothing even happens in the function. When I step past the end of this
function it goes straight into jquery.js, which appears to open the
dialogue box.
All the image handling with the file reader happens AFTER you click 'ok'
in the dialogue box. The problem is that I can't even get the dialogue box
to open at all on the iPad. There's no "" sort of thing in the HTML
either.
Does anyone know how this could be working?? Or how I could get it to
function on mobile devices? Thanks!