When change page what is change

When change page what is change

http://www.youtube.com/watch?v=qxVO0tFdiuA&feature

You can watch video. I captured video for showing problem. 

When i create popup and show listview. It is working correctly but when i change page and load listview, It is not working, I think global variable will deleted.



here select is global variable, first time openning search page it is working but 
second time openning search page,nottings work. i dont know why ? When make popup
its working. What is it changing when i change page ? How can i cancel?