How to store in a web page dynamic data in a web Page ?

Hi,

I have 1 ListBox containing :
1 ~ MACHINE A ~ 0 ~ 23 ~ R
2 ~ MACHINE B ~ 4 ~ 477 ~ R
3 ~ MACHINE C ~ 2 ~ 78~ R
4 ~ MACHINE D ~ 9 ~ 76~ T

I should have :
1 ~ MACHINE A
2 ~ MACHINE B
3 ~ MACHINE C
4 ~ MACHINE D

This ListBox is populated by a DataBase
=> So the line numbers isn't known for advance.

How to store in ASP.NET these values (0, 23, 4, ...) ? I need these values into the web page because I need them for JavaScrip functions.
Do List like HiddenFields exist ?

Thanks for your tips. ...