Update README.md

Author: jpadfield

README.md

@@ -11,7 +11,7 @@ The content of the pages are controlled with three [json](https://en.wikipedia.o
 * Any required sub-pages can then also be defined within the [sub-pages.json](./build/sub-pages.json) file. These sub-pages, or even sub-sub-pages etc, will not be given main tabs, but will be listed as buttons beneath the appropriate main page.
 
 # Screenshots 
-<table><tr><td><img src="./docs/graphics/example screenshot 01.png" height="300" alt="Example Screenshot"></td><td><img src="./docs/graphics/example screenshot 02.png" height="300" alt="Example Screenshot"></td></tr></table>
+<img src="./docs/graphics/example screenshot 01.png" width="50%" alt="Example Screenshot"><img src="./docs/graphics/example screenshot 02.png" width="50%" alt="Example Screenshot">
 
 Once the json files are updated a new set of html pages can be generated by running the command **php build.php** within the build directory of a local/downloaded copy of this repository.