jquery.ui.selectable.css
/*!
* jQuery UI Selectable 1.10.4
* http://jqueryui.com
*
* Copyright 2014 jQuery Foundation and other contributors
* Released under the MIT license.
* http://jquery.org/license
*/
.ui-selectable-helper {
position: absolute;
z-index: 100;
border: 1px dotted black;
}