reattach event handler after a jquery .html()

Your script works fine when loading a page but when we refresh the list of elements with .html() after call ajax, I attach again the event after but everything does not work properly like the ondrop.

$ ( "# Listeelements") html (response).

//this click below linked on the element about delete works
$ ('. BtnImageDelete'). On ('click', function (event) {
....
});

//this sortable below linked on the element about sort works badly
//the drag works but the drop zone is not displayed and the element does not intercalate. Once //released it returns to its original position.

var group = $ ('#sort-it ol.ollp') sortable ({
group: 'ollp',
delay: 500,
onDrop: function (item) {
onDropImage (item, group);
}
});