I would like to play an animation by click and then play reversed by clicking again...

Question

...like a menu popping out and going back again. How is this possible? Probably very simple.

Answer 1

Elaine,
What's the avantage of using sym.setVariable and getVariable rather than the simple code below? Isn't it basically the same?
// on off button example
var toggle = true,
sym.$("btn").click(function(){
          if (toggle){
                    toggle=false;
                    sym.$('Ellipse').hide();
                    sym.$('btn').html('Off');
          else{
                    sym.$('Ellipse').show();
                    toggle=true;
                    sym.$('btn').html('On');