Hi Getyourgames,

Thanks for the quick reply. I'm hoping you can help me! I made the edit on line 124 and changed this:

ycoord += event.clientY - Math.max(0,(0 + zoomimg_h + (5 * padding) + e.clientY - docheight - truebody().scrollTop));

to this:

ycoord += event.clientY - Math.max(0,(0 + zoomimg_h + (5 * padding) + e.pageY - docheight - truebody().scrollTop));

Unfortunately, I'm still getting the error

Cheers,

Colin