i try to make text strikethrough with javascript.
I know nothing about Javascript and try to search on the net how to that.

 <script language=JavaScript>

            function recal(val,sum)

            { 

                if(sum == true)

                {

                    var total = parseInt(document.getElementById(total).innerHTML, 10);

                    total+=val;

                    document.getElementById(total).innerHTML=total;        

                }

                else

                {

                    var total = parseInt(document.getElementById(total).innerHTML, 10);

                    total-=val;

                    document.getElementById(total).innerHTML=total;   

                    var pnl = document.getElementById(totalEvents);

                }







                var pnl = document.getElementById(totalEvents);

                var pnl2 = document.getElementById(eventCategory);

                var pnl3 = document.getElementById(nameID);



                **strikethrough starts here**

                if (!sum && pnl.firstChild.tagName != S && pnl2.firstChild.tagname !=S)

                {

                    pnl.innerHTML = <S>+ pnl.innerHTML+</S>;

                    pnl2.innerHTML = <S>+ pnl2.innerHTML+</S>;

                }

                else 

                {

                    pnl.innerHTML = pnl.firstChild.innerHTML;

                    pnl2.innerHTML = pnl2.firstChild.innerHTML;

                }







            }

        </script>

it makes textstrikethrough but something is wrong. Even if i choose second checkbox it affects first checkbox why :(

http://jsfiddle.net/aHH9w/ (my full html page)