javascript - Unable to set element proprieties passed as argument -


i have following code (read comments , code):

<!-- panel --> <div class="panel panel-default" num="1"> <!-- there boring stuffs --> <div style='float: right;'>     <!-- 3 buttons: hearth, tic , cross -->     <span class="glyphicon glyphicon-heart-empty" aria-hidden="true" style="margin-right: 5px;" act="1"></span>     <span class="glyphicon glyphicon-exclamation-sign" aria-hidden="true" style="margin-right: 5px;" act="3"></span>     <span class="glyphicon glyphicon-ok" aria-hidden="true" style="margin-right: 5px;" act="0"></span> </div> <!-- other boring stuffs --> <script> $('.glyphicon').click(function(){     //panel father of button clicked     panel = $(this).closest('div.panel');     //action: 1 like, 2 dislike, 3 signal, 0 accept     act = $(this).attr('act');     //send request file change in database. ignore until change() function call     $.post(         'action.php',         {id : panel.attr('num'), act : act},         function(data) {             if (data == '1') {                 //if request correct change dom elements                 //first father panel, second button clicked (this problematic argument), , action (1, 2, 3, 0)                 change(panel, $(this), act);             } else {                 alert('error occurred...please try again!');             }         }     ); }); //change dom elements function change(panel, obj, act) {     //switch action     switch(parseint(act)) {         case 1:             //this code executed 3 action doesn't work. nothing change. think problem var obj             obj.removeclass('glyphicon-heart-empty');             obj.addclass('glyphicon-heart');             obj.attr('act', '2');             break;         case 2:             //same thing here, haven't checked because first code of case 1 need work.             obj.removeclass('glyphicon-heart');             obj.addclass('glyphicon-heart-empty');             obj.attr('act', '1');             break;         case 3:             //the panel var works , blocks works             panel.removeclass('panel-default');             panel.addclass('panel-warning');             break;         default:             panel.removeclass('panel-warning');             panel.addclass('panel-default');     } } </script>

i want when click hearth fills , if click again return empty. problem when try set element proprities of obj element hearth clicked. i'm sure code executed because debugged adding console.log() in cases 1 , 2. doesn't return errors , code seems work nothing happend , clicking again attr act same.

inside $.post success callback, this no longer element clicking (which need pass change). need save reference said element outside $.post callback, , use parameter when calling change, such as:

$('.glyphicon').click(function(){     var icon = $(this),        panel = icon.closest('div.panel'),          act = icon.attr('act');      $.post(         'action.php',         {id : panel.attr('num'), act : act},         function(data) {             if (data == '1') {                 change(panel, icon, act);             } else {                 alert('error occurred...please try again!');             }         }     ); });

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