How to add quality toggle on my jwplayer?

[risgg88]

Hi there, i have a website and i’m using jwplayer.
I want to add a quality toggle for my video player but i don’t know how to configure it… here is my code :

function get_video() {
    $.get('<?= $passing; ?>', function(data, status) {
        loadVid(data);
    },'json');
}
function loadVid(d){
	var player=jwplayer("yuu-player").setup({
		sources:[{ type:"video/mp4", label:"HD", file:d.file}],
		tracks: [{ file:d.subtitle, label:'Subtitle', kind:'captions', "default":true }],
		image:d.poster,flashplayer:"https://ssl.p.jwpcdn.com/player/v/8.1.1/jwplayer.flash.swf",
		logo: { file: d.logo, logoBar:d.logo, link:set.link },
		title:"<?= $file['filename']; ?>",
		abouttext:set.name,
		aboutlink:set.link,
		controls:true,
		autostart:false,
		allowfullscreen:true,
		fullscreen:false,
		preload:true,
		primary:'html5',
		width:"100%",
		height:"100%",
		aspectratio:"16:9",
		displaytitle:true,
		playbackRateControls: [0.5, 0.75, 1, 1.25, 1.5, 2],
		sharing: { link: '<?= CURRENT_URL; ?>' } 

based on jwsupport, i should add :

var playerInstance = jwplayer("myElement");
  playerInstance.setup({
      image: "/uploads/myPoster.jpg",
      sources: [{
        file: "/uploads/myVideo720.mp4",
        label: "720p HD"
      },{
        file: "/uploads/myVideo360.mp4",
        label: "360p SD",
        "default": "true"
      },{
        file: "/uploads/myVideo180.mp4",
        label: "180p Web"
      }]
    });

Please help me… Thank youu