Persian years data entries format

Hi there,
i am using flynax for a website in persian language. since car models are divided in two main categories in our country, we have to manage them by two type of year range. a range for Gregorian year and another range for jalali (persian) year.
for example, we have 2008,2009,2010,2011,2012 in English but i want to have 1388,1389,1390,... as well.
i need this filed to be in data entries format, because i want it to be appeared in search pages by providing two combo boxes for selecting and filtering.
I edit includes/rlCommon.class.php file years code :

PHP Code:

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Only registered members can view the code. 


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now display Persian years and Gregorian years in my search forms. but not display years in listing.
please help me
Tanks

This problem solve