css for thumbnai view column spacing reducing in CSS

<style type="text/css">
body {
    font: Arial, Helvetica, sans-serif normal 10px;
    margin: 0; padding: 0;
}
* {margin: 0; padding: 0;}
img {border: none;}
.container {
padding:0px;
    height: 360px;
    width: 910px;
    margin: -250px 0 0 -450px;
    top: 50%; left: 50%;
    position: absolute;
}
ul.thumb {
    float: left;
    list-style: none;
    margin: 0; padding: 10px;
    width: 360px;
}
ul.thumb li {
    margin: 0; padding: 5px;
    float: left;
    position: relative;
    width: 110px;
    height: 110px;
}
ul.thumb li img {
    width: 100px; height: 100px;
    border: 1px solid #ddd;
    padding: 5px;

    position: absolute;
    left: 0; top: 0;
    -ms-interpolation-mode: bicubic;
}
ul.thumb li img.hover {
    background:url(thumb_bg.png) no-repeat center center;
    border: none;
}
#main_view {
    float: left;
    padding: 9px;
    margin-left: -10px;
}
</style>