Looping through form elements set as arrays

[Sleidia]

Hi

Let's say I have this form :

<input type="hidden" name="cat_ID[]">
<input type="hidden" name="cat_order[]">
<input type="hidden" name="cat_ID[]">
<input type="hidden" name="cat_order[]">
<input type="hidden" name="cat_ID[]">
<input type="hidden" name="cat_order[]">
<input type="hidden" name="cat_ID[]">
<input type="hidden" name="cat_order[]">

With javascript, how do I loop through cat_order[] elements and increment its value by 1 at each iteration?

document.getElementsByName( 'cat_order' ) doesn't seem to work

Thanks for the help!

 

[Sleidia]

Got it :

var elem_num=document.getElementsByName("cat_order[]");
var elem_tot = elem_num.length;
var test = '\n';

    for ( i=0 ; i<elem_tot ; i++ ) {

    elem_num[i].value = i + 1;
    
    test = test + elem_num[i].value + '\n';
    
    }

alert(test);

}