a.thickbox, a.thickbox:link, a.thickbox:active, a.thickbox:visited
    {
    background-image:url(/images/my-shortlist.gif);
    background-repeat:no-repeat;
    color:transparent;
    display:block;
    float:left;
    height:30px;
    overflow:hidden;
    text-indent:-1000em;
    background-position:0 0;
    width:200px;
        }

a.thickbox:hover
{   background-image:url(/images/my-shortlist.gif);
    background-repeat:no-repeat;   
    color:transparent;
    display:block;
    float:left;
    height:30px;
    overflow:hidden;
    text-indent:-1000em;
    background-position:0 -27;
    width:200px;	}


  a.proba, a.proba:link, a.proba:active, a.proba:visited
    {
    background-image:url(/images/my-shortlist.gif);
    background-repeat:no-repeat;
    color:transparent;
    display:block;
    float:left;
    height:30px;
    overflow:hidden;
    text-indent:-1000em;
    background-position:0 0;
    width:200px;
        }

a.proba:hover{
    /* background-image:url(/images/proba.gif);*/
    background-image:url(/images/my-shortlist.gif);
    background-repeat:no-repeat;
    color:transparent;
    display:block;
    float:left;
    height:30px;
    overflow:hidden;
    text-indent:-1000em;
    background-position:0 -27;
    width:200px;	}