.wc-checkbox{
    position:relative;
    display:inline-block;
    height: 20px;
    width: 20px;
    overflow:hidden;
}
.wc-checkbox input[type=checkbox]{display:none;}
.wc-checkbox .fake-checkbox{
    height: 20px;
    width: 20px;
    background-image:url(../images/icons-sprite-36x40.png);
    background-repeat: no-repeat;
    display:block;
    cursor:pointer;
}
.wc-checkbox .fake-checkbox.disabled{opacity:0.35;}
.wc-checkbox .fake-checkbox:hover, .wc-checkbox .fake-checkbox.hover{background-image:url(../images/icons-sprite-hover-36x40.png);}
.wc-checkbox .fake-checkbox.unchecked{background-position:-90px -80px;}
.wc-checkbox .fake-checkbox.checked{background-position:-90px -44px;}