click the button in the dialog box labeled "cancel". <body ref="0"><div ref="1"></DIV><form id="mturk_form" ref="3"><div ui-corner-all ui-widget-header ui-helper-clearfix ui-draggable-handle" ref="7"></DIV><div id="dialog" ui-widget-content" ref="12"><div ref="15"><button ui-corner-all ui-widget" text="cancel" ref="16">