Dashcode: button changes subview, loads url

i'm new javascript...i'm learning make web app in dashcode.

app has subviews. on 1 subview, i'm trying custom google map (a map.js file created using google map api) display. discovered can use iframe display url. problem can't google map display--other webpages display webpage comprises map.js file doesn't display map.js.

have suggestion displaying custom google map in subview?

 

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