I oddly know how to use iframe location in firefox. Honestly, most of our projects are based on Internet Explorer. It's because of ActiveX controls. Why I know how to use iframe location in firefox is because of my junior asked me how to do like that.

view plain print about
1<!--- for IE --->
2window.frames[iframeName].location = url;
3
4<!--- for Firefox --->
5document.getElementById(iframeId).src = url;

Credit : http://www.dyn-web.com/tutorials/iframes