Question

Possible Duplicate:
Get number of checkboxes that are checked in Javascript

obj = document.getElementById('myform').elements.length.checked;    

Is this the wrong code if I want to check the number of checked inputs?

Answer 1

Your code will set obj to undefined as length is a number which doesn’t have a property checked. Try something like this

var el = document.getElementById('myform').elements;
var count = 0;
for (var i = 0; i < el.length; i++)
{
    if(el[i].type == "checkbox" && el[i].checked)
    {
        count++
    }
}

alert(count);