I understand your code but it does'nt do what I want it require.
Originally Posted by gn000we
You have nested the ifs!
Also it helps to indent the code too, so you can see what it's doing.
(a cutting from your code, indented)
for(i=0; i<document.inventory_sys.elements.length; i++)
if (document.inventory_sys.elements[i].type == "checkbox")
if (document.inventory_sys.elements[i].checked == false)