A: 

Not possible from a browser.

Cory Petosky
Is there a workaround?
wamp
@wamp tell us what you want to do - which program are you trying to call?
Amarghosh
It's **flash media live encoder**.
wamp
No, there's no workaround. This is not possible.
Cory Petosky
A: 

Adobe Air is the only means of accessing client side applications from ActionScript.

See my answer here: http://stackoverflow.com/questions/3275746/air-sub-applications/3409060#3409060

Tegeril
Can I automate the installation of an independant programe with Air,like **flash media live encoder**?
wamp
Air is able to provide command line parameters and tell a process to run. At that point, it can monitor output, or close the process. If you can get that to install with that level of control, then yes. It cannot control GUI interactions, so it is up to the installer whether it can be run in a silent mode. Though I believe the user will be presented with any GUI options if they are spawned, so it can definitely start the sequence of events needed to install something.
Tegeril
But I need to get the full path to that programe to call it,right?How can I retrieve it programatically with air?
You can either have the user browse for and select it using a File object or similarly using the File object, retrieve the path to the applications directory and resolve the remainder relatively.
Tegeril
Just to keep everything clear, Air generates standalone applications and does not run in the browser.
Tegeril