如何使Jquery编码动态下拉菜单与PHP GET变量协调工作

I have a Dynamic Dropdown Menus for 3 Game Types that is coded with jquery and php. For the Game Type Dropdown, if Baseball is selected the corresponding League will show only Baseball Leagues, if Soccer is selected the corresponding League will show only Soccer Leagues and so on. This was achieved using jquery. I am forced to use $("#game_type_id").change(); so that for whatever game type is selected, the corresponding league will be shown. But the disadvantage is whatever you choose on the League Dropdown after the page submit the selection never retains, because of the forced execution of $("#game_type_id").change(). But if we're going to check if the selection is correct, I can say yes, thru the php link, such as game_type_id=1&q_lid=64, it changes.I have a Dynamic Dropdown Menus for 3 Game Type