body, html {
background-color: white;
padding:0px;
margin:0px;


}
div.front{
z-index:20;
position:relative;

}

div.base {
background-image:url("back.png");
width: 512px;
height:512px;
}
table.main{
position:relative;
z-index:30;

}
table.others {
position:relative;

z-index:0;

}