#container {
margin:100px auto;
width:800px;
visibility:visible;
overflow:hidden;
z-index:2;
}
#con-ul {
margin:0;
padding:0;
list-style-type:none;
z-index:1;
width:2410px;
height:262px;
}
li {
float:left;
margin:0 5px;
overflow:hidden;
}
img {
display:block;
border:1px solid red;
width:255px;
height:260px;
}
// 判断left距离是否到了ul宽度的三分之二,如果是就把left设置为零
if (math.abs(parseint(conul.style.left)) === parseint(conul.offsetwidth * 2 / 3)) {
conul.style.left = 0;
}