This jQuery snipper allows you to make any key combo you want, via codes. Just grab the key codes here: http://keycodes.atjayjo.com/

js-keycombo.js

var map = {87: false, 83: false}; // Update checked keys
$( document ).keydown( function( e ) {
    if ( e.keyCode in map ) {
        map[e.keyCode] = true;
        if ( map[87] && map[83] ) { // update checking of keys
            console.log('here'); // Action goes here
        }
    }
}).keyup(function(e) {
    if ( e.keyCode in map ) {
        map[e.keyCode] = false;
    }
});