.content
{
    overflow: auto;
    position: relative;
    width: 740px;
    max-width: 100%;
    height:400px;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    z-index:0;
    
}

.content.hidden
{
    display: none;
}
.content ul li {list-style: none;}