PHP Variables not Calculating Correctly

SOURCE: http://pastebin.com/mBJMGean

Variables are still not calculating correctly, They always reset every time even with using $_SE开发者_Go百科SSION variables.

This is trying to become a slideshow with 2 buttons that control 'next' and 'prev'

The variable controls are Picture ID and then the buttons control what the variable is.

it somehow loops from 3 to 1 and wont move any more.

Help is needed please. Thanks.

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You can't have any output before the session_start(). Move it up above your html and try again.