Hello ! I have a question and maybe you can answer it :) (i'm french so sorry for my english :p) I actually put a list to define the type of armor equiped. And right to it i have a textbox (input) disabled (it's the number of armor point depending of the type of armor..) The list ! no problem : <select id="equip" name="attr_equip" style="width: 14em;"> <option value="01">Armor 1</option> <option value="02">Armor 2</option> <option value="03">Armor 3</option> <option value="04">Armor 4</option> <option value="05">Armor 5</option> </select> (Armor 1 have 2 armor point, armor 2 = 4 , armor 3=8 .. . . .. ) and right to it i have this: <input name="attr_ptsarmure" min=0 style="width: 4em;" type="number" disabled=true> How can i change the value of "attr_ptsarmure" depending of the choice of "attr_equip" Thank you for your answer :)