javascript get element by id vs object id
<p>why do you have to use getObjectById, if you already know the ID of an object?  It keeps on throwing me off, because I replace it with the ID of the element that I am referring to. </p>

<p>EDIT:
I think i may have just forgotten the #.  But why does getObjectById exist, if you can assign an element an ID?</p>
