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Can't write anything with javascript in a new window create dynamically with "window.open"

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I develop a website and an application in html/css/javascript and i have a problem. I need to open a new window with "window.open", and then change and modify the content dynamically with javascript in it. It works perfectly in Firefox 3.6 and lower but not in Firefox 4. In Firefox 4, the window is created, but it stay white with "about blank" as name. Do you have an idea of what I can do? Can I detect if the browser is Firefox 4, and if it is true, instead of "window.open", create a new tab? Can I change the content dynamically in it, and how?

Thanks for your help Jonathan Donzallaz

I develop a website and an application in html/css/javascript and i have a problem. I need to open a new window with "window.open", and then change and modify the content dynamically with javascript in it. It works perfectly in Firefox 3.6 and lower but not in Firefox 4. In Firefox 4, the window is created, but it stay white with "about blank" as name. Do you have an idea of what I can do? Can I detect if the browser is Firefox 4, and if it is true, instead of "window.open", create a new tab? Can I change the content dynamically in it, and how? Thanks for your help Jonathan Donzallaz

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This forum focuses on end-user support. You can find more web development help on the mozillaZine Web Development board. Separate forum, separate registration. Please note the tips in the Sticky Post at the top of the forum before posting. Also, it's helpful to post a link to a "test case" that demonstrates the problem.