.ui-checkbox {
    position: relative; margin-top:.3em; font-weight:normal;
    background: white !important;
}
.ui-checkbox .ui-checkbox-inputwrapper { width: 0; height: 0; overflow: hidden; }
.ui-checkbox label { display: block; position: relative; padding-right: 1em; line-height: 1; padding: .5em 0 .5em 3em; margin: 0 0 .3em; cursor: pointer; z-index: 1; color:#555555; font-size: 1.1em;}
.ui-checkbox .ui-checkbox-box { position: absolute; top: 0; left: 0; width: 19px; height: 19px; }

span.ui-checkbox-icon {
    background: url("../img/icon_checkbox.png") no-repeat scroll 0 -43px transparent;
    background-image: url("../img/icon_checkbox.png") !important;
    clear: left;
    display: block;
    float: left;
    height: 18px;
    margin-bottom: 5px;
    width: 18px;
}

.ui-state-hover span.ui-checkbox-icon {
    background-position: 0 -117px;
}
span.ui-checkbox-icon.ui-icon-check {
    background-position: 0 0;
}
.ui-state-hover span.ui-checkbox-icon.ui-icon-check {
    background-position: 0 -74px;
}
.ui-checkbox-disabled label {
    cursor:default;
}