.off not functioning

gistfile1.txt

var foo= $(document).on("pagecreate","#section2",function(){
  $("#section2").on("swiperight",function(){
    $.mobile.changePage("#section1",{transition:"slide", reverse:true
      
    });
    var handler = function(event) {
    if(document.getElementById('drop').style.display=="block") {
        $("#section2").off( "swiperight");
        console.log("remove");
    }
  };

    

  }); 

  console.log("section2 right");
  

});