child frame

<frameset rows="75%,*" cols="*" frameborder="yes" bordercolor="#FFFFFF">
<frame src="top.asp?contract_id=<%=contract_id%>" name="topframe">
<frame src="bottom.asp?contract_id=<%=contract_id%>" name="bottomframe">
</frameset>


inside top.asp


onClick="javascript: self.bottomframe.document.write('A message from the parent window.');


is there a reason that this doesnt work?

You are going to need to leave a lot more information than that. We can't read your mind.