Question

I want to count all the select list where its value selected as 1. All the selected list has a class called ‘sllist’. And how to do If I want to update the count in to hidden field when a select list selected value change to 1. plz help.

<select id="status_1971" class="sllist" size="1" name="status_1971">
<option value="0">Disable</option>
<option selected="selected" value="1">Enable</option>
</select>

<select id="status_1975" class="sllist" size="1" name="status_1975" disabled="disabled">
<option selected="selected" value="0">Disable</option>
<option value="1">Enable</option>
</select>

<select id="status_1974" class="sllist" size="1" name="status_1974">
<option value="0">Disable</option>
<option selected="selected" value="1">Enable</option>
</select>

Answer 1

$(".sllist").change(function() {
   var len = $(".sllist").filter(function() {
        return $(this).val() === "1";
    }).length;
    $("input").val(len);
}).change();

Demo.