<style type="text/css">span.js-slider {display : none;position : absolute;background-color : white;border : 1px solid black; padding : 2px; width : 300px}</style>

<script type="text/javascript">
function slider(span_id) {
    $('#' + span_id).slideToggle('{speed}');
}

function hide_slider(span_id) {
    $('#' + span_id).hide();
}
</script>