York Illustrated 
What is JavaScript?
JavaScript is a programming language that is often used to add dynamic or interactive features to otherwise static webpages without the need to refresh the page during the interaction. For example:
- It can add 'animation' to a page, either to draw attention to a specific part of the page, or to make the page easier to use (for example by resizing the page or hiding / showing text in response to a user's interaction).
- It can be used to validate data-entry fields, without the need to refresh the page for each field.
JavaScript is supported by all of the major internet browsers.
Please note that 'JavaScript' is NOT the same as 'Java'. (This website does NOT use Java.)
If you would like to know more about JavaScript, please use the link provided in the 'External Links' section below.
Does this website use JavaScript (i.e. does JavaScript need to be enabled)?
Yes. This website uses JavaScript for the following:
- To adapt the layout of webpages to suit the size of the screen.
- To adjust the size of some images to suit the size of the screen.
- To show / hide help text on some pages (e.g. those containing filterable 'views' of database content).
- To display text in an 'overlay'.
- To display slideshows for images.
- To display interactive maps.
Please note that this list is NOT exhaustive.
If you wish to use and enjoy all of the features and functionality of this website, you will need to enable JavaScript via your browser's configuration pages.
External Links
Wikipedia provides a helpful review of the history and use of JavaScript - see: