.facebook_icon {
    background: url("../Images/shareIcons16.png") no-repeat scroll 0 -1568px transparent;
    display: block;
    height: 16px;
    line-height: 16px !important;
    overflow: hidden;
    width: 16px;
}
.twitter_icon {
    background: url("../Images/shareIcons16.png") no-repeat scroll 0 -5136px transparent;
    display: block;
    height: 16px;
    line-height: 16px !important;
    overflow: hidden;
    width: 16px;
}