When editing multiple javascript files, each of which are supposed to be available in the global scope because - for example - they will each be loaded in the same html document, Galileo supported this little trick to put comment tags for other files that are required to be available in the same scope:
myfile.js:
// @include "somefile.js"
// @include "otherfile.js"
And you have cross-file code completion in myfile.js.
But now that I moved to Eclipse Helios, this doesn't work anymore. Did they move similar functionality to some other method?