#demoTop {
float:left;
margin:auto;
padding:auto;
overflow:hidden;
height: 480px;
width: 238px;
border:0px;
}


#demoTop .indemo {
float: left;
width: 100%;
}

#demo1,#demo3 {
float: left;
border:0px 
}
#demo2,#demo4 {
float: left;
border:0px 
}

#demo1 img,#demo2 img,#demo3 img,#demo4 img{
width:160px;
height:40px;
margin:10px;
border:0px;
}