Does this script is right?

[clove28]

I would like to ask how to switch codes (invocation codes for different banner zones). I have seen this code but Im not sure if it's correct.

if(Webbrowser){

728x90 
<!--/*
*
* Revive Adserver Asynchronous JS Tag
* - Generated with Revive Adserver v3.2.1
*
*/-->

<insdata-revive-zoneid="13"data-reviveid="713df90a5694f87d7cd7c1884e8e2f44"></ins><scriptasyncsrc="//www.site.com/www/delivery/asyncjs.php"></script>

}

if(MobileBrowser){

300x50 Invocation code

}