{mouseup,23}{mousedown,0}{mousedown,0}select nothing and click submit. <body ref="0"><form id="mturk_form" ref="1"><div id="wrap" ref="2"><div id="area" ref="3"><div id="boxes" ref="4"><label ref="5"></LABEL><label ref="8"><input type="checkbox" id="ch4" value="false" ref="18"><button id="subbtn" recordingtarget="true" text="submit" ref="23">