How to determiine which dropdown was used - html-select

Question

I have a form with more than one dropdown list, like this below. I can see how to get the ID's of each dropdown but I can't figure out how to get the one that was actually used. Would someone explain how to do that, please.
<div>
<select name="id[11]" class="pullDown" id="attrdrop0">
<option class="pink" value="31`">No</option>
<option class="pink" value="32">Yes (+$40.00)</option>
</select>
</div>
<div>
<select name="id[10]" class="pullDown" id="attrdrop1">
<option class="pink" value="31">No</option>
<option class="pink" value="32">Yes (+$150.00)</option>
</select>
</div>
<script>
$(function () {
$("#prices").change(function () {
console.log('A change was made');
CalculatePrice();
});
});
function CalculatePrice() {
var ttl_price = 0;
var id = '';
$(":input.select, :input").each(function() {
var cur_price = $('option:selected', $(this)).text();
ttl_price += cur_price;
id = $(this).attr('id');
/*** What now ***/
});
SetPrice(id, ttl_price);
}
</script>

Answer 1

You can pass the control as a parameter to CalculatePrice.
$(function () {
$("#prices").change(function () {
console.log('A change was made');
CalculatePrice(this);
});
});
function CalculatePrice(triggerObject) {
var ttl_price = 0;
var id = '';
$(":input.select, :input").each(function() {
var cur_price = $('option:selected', $(this)).text();
ttl_price += cur_price;
id = $(this).attr('id');
/*** What now ***/
if (triggerObject.id) {...}
});
SetPrice(id, ttl_price);
}
</script>