making admin post/page writing right-to-left oriented?

hi,

i use my wordpress to make posts in Arabic, so i need the writing area under posts and pages to be right-to-left oriented.

to accomplish that, i suppose i’m gonna have to add the ‘dir=”rtl”‘ attritbute to a couple of ‘textarea’ tags in the core files of wordpress?

i just don’t know where to find those ‘textarea’ tags and how many of them i’m going to have to change.

i hope someone can help me.

thanks,