flash alternate content

[lananci]

Hi everyone,
I have a full-flash website, in a fullscreen window.
I was trying to add some nice alternate HTML content, shown if the user has no player installed. I would add something more than the sad "Flash player not installed. Get Flash." sentece with link.
In the <noscript> area, there should be no problem. I can see it and looks good.
If I place the same content (a table) between the ' '; in this area

var alternateContent = 'Alternate HTML content here.'
+ '<a href=http://www.macromedia.com/go/getflash/>Get Flash</a>';
document.write(alternateContent);

the flash content is not shown anymore. The page is "empty".
So I figured out that it's not the right way.
Shoul I place the URL of another page?
Like this:

var alternateContent = 'http://www.desperatehousecat.it/alternate.asp>';
document.write(alternateContent);

If you say it might work, I'll trust you. But I really would see it.
Is it there any way to test it without unistalling flash player? Last time I did unistall, it led me to a mess. I couldn't install the player again (on browser) and I spent 50€ to repair. I'd really love to avoid that. And a flash designer without flash player is no good.

Thank you very, very much.