appending and detaching elements jquery

I think you meant to use this link http://jsfiddle.net/Qgj52/2/

Unless somebody else understands this, I think I am confused as to what you want to do.

>how can i detach it and attach it again

Can you detail what you mean, I think I am missing something.

the code you have seen in the fiddle it works fine, now the issue is you see the default option as "Al Sections"

What i am trying is when i select from drop down any other value, it should reflect the th and the TD which is dynamicaaly created

Now, when i again do back forth and select "all selections" again, it should not display that column. and when i again choose another value, it should start again

i tried using hide, detach, remove but it does not work as expected

....update....  I think this is what you want http://jsfiddle.net/Qgj52/4/

$(function () {
    var firstTime = true;

    $("#myselction").change(function (e) {
        var neData = $("#myselction").val();

        if (firstTime) {
            $("table.data thead tr").append("<th>Idea</th>");
            $("table.data tr:gt(0)").append("<td>" + neData + "</td>");
          firstTime = false;
        } else {
            if (neData!="All Selections(4)"){
            $("table.data tr:gt(0) td:last-child").html(neData);
        }else{
              var colCount = 0;
              $('tr:nth-child(1) td').each(function () {
              if ($(this).attr('colspan')) {
                  colCount += +$(this).attr('colspan');
              } else {
                 colCount++;
                }
              });
            
            if (colCount>2){
                $("table.data th:last-child, table.data td:last-child").remove(); 
             firstTime = true;
            } 
        }
            
        }
    });
});

Select allOpen in new window

third one seems good, only thing is: when i elect "All selections", it should remove the td of IDEA and when i choose again the dropdown value of 100 or 104, the IDEA td should appear again

Thanks Guys