# SWFObject: using ExpressInstall

**URL:** <https://forum.kirupa.com/t/swfobject-using-expressinstall/236247>\
**Category:** flash\
**Created:** [August 18, 2007, 10:05pm UTC](https://forum.kirupa.com/t/swfobject-using-expressinstall/236247 "2007-08-18T22:05:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![thalamus](https://avatars.discourse-cdn.com/v4/letter/t/0ea827/32.png) [@thalamus](https://forum.kirupa.com/u/thalamus)\
**Post date:** [August 18, 2007, 10:05pm UTC](https://forum.kirupa.com/t/swfobject-using-expressinstall/236247/1 "2007-08-18T22:05:57Z")

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Hello:

As I understand it, I would use the ExpressInstall parameter in SWFObject:  
so.useExpressInstall(‘expressinstall.swf’);  
if Flash IS installed on the user’s browser and their version \< my version.

Can I also use the redirectUrl attribute:  
so.addAttribute(“redirectUrl”, “[http://www.example.com/altcontent.htm](http://www.example.com/altcontent.htm)”);  
to display alt content if Flash is not installed/disabled in browser?  
Or will it always go to the alt content?

Thanks.