Jquery-ui选项卡（ajax）...重新选择选项卡时停止选项卡重新加载URL

I am using jquery ui tabs and im adding tabs dynamically using .tabs('add'...). The tabs load a url using ajax. The problem is that everytime i click on another tab then come back... the tab reloads the url. i want the url loaded once.... any ideas?I am using jquery ui tabs and im adding tabs dy