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<select class="addbed_select">
<option value="0">不加</option>
<option value="1">1张</option>
<option value="2">2张</option>
<option value="3">3张</option>
</select>
<select class="addbed_select">
<option value="0">不加</option>
<option value="1">1张</option>
<option value="2">2张</option>
<option value="3">3张</option>
</select>
<script>
$(document ).on( 'change', '.addbed_select', function () {
var sum = 0;
$( '.addbed_select' ).each( function () {
sum += parseInt( $( this ).val() );
} );
var thisval = $( this ).val();
console.log( '这个select的值为' + thisval );
console.log( '总select的值为' + sum );
} );
</script>