In the example
http://openlayers.org/dev/examples/custom-control-point.html, the line
that says:
map = new OpenLayers.Map( $('map') );
I suppose this must return a reference to a div named 'map' but why wrap
it in such a weird function? Wouldn't
map = new OpenLayers.Map( "map" );
work just as well?
I'm still pretty new to JavaScript and OpenLayers but I can't find a
reference to the function $() in my 5 lb JavaScript book (it's amazing
what's NOT in the Rhino book!) nor can I find it in the OpenLayers docs.
And Google seems to have a mental block against searching for anything
that looks like punctuation even if I try "$()".
I'm especially curious because I also saw a reference to "library
dependence on $" in the recent discussion about OpenLayers and jQuery,
and don't know what it means.
So would somebody kindly clue me in on this one too?
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