#BackToTop {
    display: none;
    overflow: hidden;
    width: auto;
    z-index: 90;
    position: fixed;
    bottom: 100px;
    right: 20px;
    top: auto;
    left: auto;
    font-family: sans-serif;
    font-size: 1em;
    color: #fff;
    text-decoration: none;
    padding: 17px 16px;
    -webkit-background-origin: border;
    -moz-background-origin: border;
    -icab-background-origin: border;
    -khtml-background-origin: border;
    -o-background-origin: border;
    background-origin: border;
    -webkit-background-clip: padding-box;
    -moz-background-clip: padding-box;
    -icab-background-clip: padding-box;
    -khtml-background-clip: padding-box;
    -o-background-clip: padding-box;
    background-clip: padding-box;
    -webkit-box-shadow: 0 1px 3px rgba( 0, 0, 0, 0.4 ), inset 0 0 0 1px rgba( 0, 0, 0, 0.2 ), inset 0 1px 0 rgba( 255, 255, 255, .4 ), inset 0 10px 10px rgba( 255, 255, 255, .1 );
    -ms-box-shadow: 0 1px 3px rgba( 0, 0, 0, 0.4 ), inset 0 0 0 1px rgba( 0, 0, 0, 0.2 ), inset 0 1px 0 rgba( 255, 255, 255, .4 ), inset 0 10px 10px rgba( 255, 255, 255, .1 );
    -moz-box-shadow: 0 1px 3px rgba( 0, 0, 0, 0.4 ), inset 0 0 0 1px rgba( 0, 0, 0, 0.2 ), inset 0 1px 0 rgba( 255, 255, 255, .4 ), inset 0 10px 10px rgba( 255, 255, 255, .1 );
    -o-box-shadow: 0 1px 3px rgba( 0, 0, 0, 0.4 ), inset 0 0 0 1px rgba( 0, 0, 0, 0.2 ), inset 0 1px 0 rgba( 255, 255, 255, .4 ), inset 0 10px 10px rgba( 255, 255, 255, .1 );
    -khtml-box-shadow: 0 1px 3px rgba( 0, 0, 0, 0.4 ), inset 0 0 0 1px rgba( 0, 0, 0, 0.2 ), inset 0 1px 0 rgba( 255, 255, 255, .4 ), inset 0 10px 10px rgba( 255, 255, 255, .1 );
    -icab-box-shadow: 0 1px 3px rgba( 0, 0, 0, 0.4 ), inset 0 0 0 1px rgba( 0, 0, 0, 0.2 ), inset 0 1px 0 rgba( 255, 255, 255, .4 ), inset 0 10px 10px rgba( 255, 255, 255, .1 );
    box-shadow: 0 1px 3px rgba( 0, 0, 0, 0.4 ), inset 0 0 0 1px rgba( 0, 0, 0, 0.2 ), inset 0 1px 0 rgba( 255, 255, 255, .4 ), inset 0 10px 10px rgba( 255, 255, 255, .1 );

}

    #BackToTop span {
        display: block;
        cursor: pointer;
        background: url('/Content/Public/Image/Icon/up.png') no-repeat;
        width: 15px;
        height: 9px;
    }