Mobile Safari "hover" (x positon of finger matches x position of image)

I'm working on a web app where I don't really have web hooks for hovers (think touch device). I can get x coords of exactly where the mouse is at all times.

I need to check to se开发者_开发问答e if the x coords of the mouse is over top of an image, and then grab that image I'm over top of.

What I'm doing

I'm using jQuery right now, and what I do is setup an array (imgCoords) of the offset.left value of each image. I then use

imgCoords.indexOf(mousePosition.x);

(mousePosition.x) is made up, but you get the idea.

I use the above code to grab the image that matches that returned index

fingerCoordToImgIndex = imgCoords.indexOf(mousePosition.x);
$('img').eq(fingerCoordToImgIndex).css({'stuff'});

This only works for the initial entry of mouse over image though (finger x only matches image x, not image x + width), and seems inefficient. I think I could thrash around a little longer to get it right, but I'd love it if one of you pro's could rescue me =p

Thanks tons! -Ken