how do I define a keys variable?

I have a java script that runs an upload and after it finishes I want it to go to the view page for the record.

I have the code in the java script but I need to have the key defined and I don't know how to do that.
<param name="Common.FinishUrl" value="http://www.mysite/add_projects_view.php?editid1=".$keys["ID";]).'">
Thanks

Patti