when visiting a vertical slide and then going back to the first slide, the function would return false. made it more fail proof by checking the indices directly.  | 
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|---|---|---|
| .. | ||
| reveal.js | ||
				when visiting a vertical slide and then going back to the first slide, the function would return false. made it more fail proof by checking the indices directly.  | 
			||
|---|---|---|
| .. | ||
| reveal.js | ||