<select id="nfl">
<option value="Bears Still...">Chicago Bears</option>
<option selected="selected" value="Go Pack">Green Bay Packers</option>
</select>
console.log($('#nfl').val()) logs "Go Pack" to the console
Set the value to an empty string $('#nfl').val("")
console.log($('#nfl').val()) logs "" to the console
var select = document.querySelector('select'); //hopefully you'll use a better selector query
select.selectedIndex = 0; // or -1, 0 sets it to first option, -1 selects no options