Javascript and only one Checkbox - undefined

Question

for (i = 0; i < document.checks.user.length; i++) //for all check boxes
{
    if (document.checks.user[i].checked == true )
    {
        document.checks.submit()         


        

Answer 1

Use a loop control variable, and set it to 1 if length is undefined...

var len = document.checks.user.length;
if(len == undefined) len = 1;
for (i = 0; i < len; i++) //for all check boxes

Best regards...

Answer 2

jQuery is your friend:

$("input[type='checkbox']").attr('checked', false);

(... if jQuery is available to you?)