Access javascript variable outside of function

Question

I have an init() function which creates an image overlay for a map when the html body is loaded. within the function a mapOverlay variable is created. It\'s basically the functi

Answer 1

You need to declare the variable outside of the scope of your function to be able to use it in other functions.

So:

<script>
  var mapOverlay;
  function init() 
  {
    //stuff
    mapOverlay = new OpenSpace.Layer.MapOverlay("logo");
    //more stuff
  }
  function ChangeImage()
  {
    //stuff
    mapOverlay.setHTML('<img src="$Choice" style="width: 100%; height: 100%; opacity: 0.8;"/>');
  }
</script>