Q1051 How can I load another document in the second frame after the first frame has completed loading?

It depends. If you are loading the complete frameset from scratch, then you could use the FRAMESET onLoad event handler:

<frameset onLoad="frames[1].location.href='http://www.irt.org'">
<frame src="page1.htm">
<frame src="page2.htm">
</frameset>

If you have access to the page in the first frame, then you could use the BODY onLoad event handler:

<BODY onLoad="parent.frames[1].location.href='http://www.irt.org'">

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