how to detect Compatible CLDC version of Phones?

i am currently working on mobi开发者_如何学Pythonle base xhtml site. in this site i have to do download page. for this i need to detect Compatible CLDC version of Phone. please help me.

thanks

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Server side, you read the HTTP "User-Agent" header that should be attached to any HTTP request.

Match it against WFURL to figure out what you need to do to support the device (i.e. adapt your generated CSS code to the handset screen size...).