Click handler button function to control symbols

Question

Hi,
I have a remote control image which has 2 buttons (Slide button & Bar Graph button).  Thanks to help from resdesign the first button controlling a slideshow of 15 images works.  In the slideshow there are question slides that need to launch an animated bar graph symbol showing the results.  I'm able to launch the first bar graph for slide 3.  I'm using the container method to place the bar graph on the stage.  The bar graph symbol can be closed using a click event from within the symbol.   Here are my questions:
How to toggle the bar graph off OR delete the bar graph symbol when the Bar Graph button is clicked again.
How to prevent multiple instances of the bar graph from launching in the container?
How to close the bar graph if the user advances to the next slide? 
Here's the code to control the Bar Graph button on compositionReady:
var bgOn = false;
sym.$("buttonbg").click(function(){
                    if (bgOn == false) {
                    sym.createChildSymbol("bg1", "bargraph_container3");
                    var container =  sym.getSymbol("bargraph_container3");
                    sym.container("bg1").play();
                    bgOn = true;
                    else {
      sym.deletesymbol();  //If bar graph symbol is already on, when buttonbg is clicked again then delete "bg1"
      bgOn = false;  // reset to false, click will relaunch "bg1"
Here's the project file.
http://dl.dropbox.com/u/10647145/necc_viewer_nov2012.zip
Thanks for your time,
-Robert

Answer 1

==> file attached.
1) Symbol "stage", compositionReady:
sym.bgOn = false;
sym.$("buttonbg").click(function(){
if (!sym.bgOn) {
sym.bg1 = sym.createChildSymbol("bg1", "bargraph_container3").play();
//var container =  sym.getSymbol("bargraph_container3");
//container("bg1").play();
sym.bgOn = true;
} else {
sym.bg1.deleteSymbol();  //If bar graph symbol is already on, when buttonbg is clicked again then delete "bg1"
sym.bgOn = false;  // reset to false, click will relaunch "bg1"
2) Symbol "bg1", close.click:
sym.getParentSymbol("bargraph_container3").getParentSymbol("Stage").bgOn = false;
sym.deleteSymbol();