After jQuery UI (sortable, resizable): Cannot marker the text anymore -

after implemented jquery ui functions sortabable , resizable, cannot marker text anymore (markering text: left mouse click , dragging mouse).

i testet already: without following code, can marker texts.

$( ".panelcontent" ).resizable({     handles: \'s\',     stop: function(e,ui) {         $.cookie(this.id, ui.size.height, { expires: 1825 });     } }); $( ".togglepanelcontent" ).click(function() {     var icon = $( );     icon.closest( ".panelgroup" ).find( ".panelcontent" ).slidetoggle();     icon.closest( ".panelgroup" ).find( ".panelheadbar" ).toggleclass("panelheadbar_m");     icon.text(icon.text() == "+" ? "--": "+"); });  $( ".padding_10px" ).sortable({     handle: ".panelheadbar",     helper: "clone",     appendto: ".content",     connectwith: ".left, .right" }).disableselection(); 

remove .disableselection(); , should work again.