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Rerolling a Character
If you would like to reroll your character back to level 1, you can use this option. It is also handy if you wish to change classes to a different class.
To reroll your character, click it once to select it, then click the REROLL button. Finally, type REROLL in the confirmation box to reroll your character back to no class selected. This process is final and cannot be undone. Your character will retain all proficiencies and items, but lose all experience, stats, and levels.
from there :
http://ladderslasher.d2jsp.org/index.php?g=4 