jQueryで属性値がマッチした要素を取得
HTML
<div id="res">result</div>
<select name="year">
<option>y1</option>
<option>y2</option>
</select>
<select name="month">
<option>m1</option>
<option>m2</option>
</select>
<select name="date">
<option>d1</option>
<option>d2</option>
</select>
JavaScript
jQuery( function( $ ) {
$( 'select' ).filter( function () {
return $( this ).attr('name').match(/^(y|m)/);
}).change( function() {
$( '#res' ).text( $( this ).val() );
} );
} );