OK, it's not a language, it's a library. Just a scratchpad for my scraps of jQuery snippets.

1. Set the contents of an element (like .innerHTML)

   $('#myId').html('new string');
   

2. Bind a click event

   $('#Stop').bind('click',function(){reset();});
   

3. Run this method when the page is loaded and ready.

   $(document).ready(updateWidgets);
   

4. Set the value of a jQuery UI slider

   $('#radiusSlider').slider("value",radius);