.checkbox { width:19px;height:25px;padding:0px;background:url(/Content/img/btn/checkbox.png) no-repeat;display:inline-block;margin:0px auto 0px auto; }
.chkSelect { background-position:0px -50px; }
.chkSelectOver { background-position:0px -75px; }
.chkNormal { background-position:0px 0px; }
.chkNormalOver { background-position:0px -25px; }