.rknop { background: #036 url(../images/rpijltje.jpg) no-repeat left center; color: #FFF; padding-left: 1em; font-weight: bold; width: 140pt; }
.rknophover { background: #FFF url(../images/rpijltje-neg.jpg) no-repeat center left; color: #003; padding-left: 1em; font-weight: bold; width: 140pt; }                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

.lknop { background: #036 url(../images/lpijltje.jpg) no-repeat left center; color: #FFF; padding-left: 1em; font-weight: bold; width: 140pt; }
.lknophover { background: #FFF url(../images/lpijltje-neg.jpg) no-repeat center left; color: #003; padding-left: 1em; font-weight: bold; width: 140pt; }                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

.hknop { background: #036 url(../images/hpijltje.jpg) no-repeat left center; color: #FFF; padding-left: 1em; font-weight: bold; width: 140pt; }
.hknophover { background: #FFF url(../images/hpijltje-neg.jpg) no-repeat center left; color: #003; padding-left: 1em; font-weight: bold; width: 140pt; }                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

.xknop { background: #036 url(../images/x.jpg) no-repeat left center; color: #FFF; padding-left: 1em; font-weight: bold; width: 140pt; }
.xknophover { background: #FFF url(../images/x-neg.jpg) no-repeat center left; color: #003; padding-left: 1em; font-weight: bold; width: 140pt; }