$(function() {
    $('#spalte1').click(function() {
        var trs = $('tr');
        for(var j = 0; j < trs.length-1; j++){
            var length = trs.length - 1;
            for(var i = 1; i < length; i++){
                var thisone = $('tbody').children().get(i);
                var nextone = $('tbody').children().get(i+1);
                var thisval = thisone.cells[1].innerHTML;
                var nextval = nextone.cells[1].innerHTML;
                if(Number(thisval) > Number(nextval)){
                    $(thisone).insertAfter($(nextone));
                }
            }
            length = length - 1;
        }
    });
});