Can someone help me with this if condition

[Medina]

ok so that`s the problem. But that`s not what I want.


I want when you post a quickreply the width of the reply will be 500px and when I refresh the page it will also get a width off 500px.


But when you read a pm I wanna a width of 300px.


I have tried this:

<if condition="in_array(THIS_SCRIPT, array('showthread', 'newreply', 'showpost'))">

but then it will work good on on a topic, also when I post a quick reply. But when I read a pm, it doesnt dissapear. :S