$.ajax({
   url:url,
   method:'GET',
   headers:{ 'Accept': 'application/json; odata=verbose' },
   success: function(data){
     var dat = data.d.results;
      for (var i = 0;i < dat.length; i++){
    html+='<optionvalue='+itm.dateVal+'>'+itm.dateVal+'</option>';
       }     $('#week-selector').append(html);
   },
   error: function(e){
    console.log('error:'+e);
   }
});