Hi, javascript newbie here.

While creating some checkboxes I've named all the checkboxes the same.

<input type="checkbox" name="check_list[]" value="1">
<input type="checkbox" name="check_list[]" value="2">
<input type="checkbox" name="check_list[]" value="3">
<input type="checkbox" name="check_list[]" value="4">

Normally, I'd be able to get the number of elements in the array with the following, if I hadn't included the brackets in the name:

document.MyForm.check_list.length;

However, when the name contains brackets, which I'm pretty certain is what is causing the problem, I'm not able to use my ordinary method.

Got any idea how to get the number of elements now?

The idea that using [] in the field names will return an array in the HTTP request is incorrect and just makes the name attribute invalid.

By giving the checkboxes all the same name the checked items will be returned as a comma separated string

The length of any Java script array can be found by using its length property. Moreover, there has been the length property that can be used to loop through array elements. Array numbering starts from 0 in Java script. Therefore, the name of the array is the second element of the array. As a result, the last element of the array is the total size of the array minus 1.