ul.synergycaptcha { margin:0; padding:0; }
ul.synergycaptcha li { list-style:none; border:1px solid black; float:left; position:relative; margin:5px; padding:0; background:none; }
ul.synergycaptcha li input { position:absolute; left:0; top:0; }
ul.synergycaptcha li label { display:block; width:100%; height:100%; cursor:pointer; }
ul.synergycaptcha li img { vertical-align:middle; display:none; }