HTML TEXT BOX VALUE RETAIN

Question

HI EVERY ONE

I HAVE ONE HTML TEXT BOX  ANY USER SUBMIT THE DATA AFTER POST BACK I WANT TO DISPLAY THE SAME DATA WHAT HE INSERT BEFORE POST BACK AND ONE MORE THING I CANNOT USE RUNAT="SERVER" IN HTML TEXT BOX BECAUSE I PUT THE CALENDER JAVA SCRIPT BESIDE TO THAT TEXT BOX IF I PUT RUNAT="SERVER" THE SCRIPT IS NOT WORKING SO I TRY TO USE THE PUBLIC VARIABLE IN ASPX.CS FILE AND THAT VARIABLE I USED IN JAVASCRIPT BUT ITS NOT WORKING PROPERLY

PLEASE ANY ONE KNOW HOW TO DISPLAY THE VALUE WHICH HE SUBMIT AFTER POST BACK IN HTML TEXT BOX

THANKS IN ADVANCE