how to populate parent window from child window usin coldfusion

[daraptor]

hey guyz.....how do i populate parent window from child window ........

lets say.....my parent window is

<div align="left"><strong>search or <a href="javascriptpenpopup('example.html')">finite </a> </strong><form>
<strong>From:</strong>
<input type="text" id="textField">
</form>
<div id="contentArea"></div></div>

and my child window has a href link it....so what should i do to populate teh parent window when i click the href link in child window......i would appreciate any kinda help or suggestions guyz....thanx....