a{text-decoration:none;}
a img{border:none;}
/* demo */
.demo{width:680px;margin:0 auto;}
.demo h2{text-align:center;margin:30px 0 20px 0;font-size:16px;}
.demo p{line-height:22px;}
/* stage */
#next, #previous{width:29px;height:43px;overflow:hidden;cursor:pointer;z-index: 999;background-color: red;}
#previous{background:url(prev-button.png) no-repeat;}
#next{background:url(next-button.png) no-repeat;}