Windows Firefox Page Flickering on load internal IFRAME

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Hi, I’m having a trouble with Windows Firefox (3.6.16):

I have a web page wich contains an IFRAME. Eventually a javascript code executes (from the main page) the next action:

xIFRAME.contentWindow.document.form1.submit();

where xIFRAME is the reference to the DOM object representing the IFRAME inside main page.

This excecution make page flickering of all page (not only the IFRAME).

Also I’ve tried with xIFRAME.src = “some URL”, but the page flickering stills.

¿what’s wrong? ¿what must I check to avoid this behavior?

In IE don’t have such behavior.

Thanks