show hide using css code example

Example 1: hide element using css

#tinynav1
{
  display:none
}

Example 2: Show/Hide

<script type="text/javascript">
<!--
    function toggle_visibility(id) {
       var e = document.getElementById(id);
       if(e.style.display == 'block')
          e.style.display = 'none';
       else
          e.style.display = 'block';
    }
//-->
</script>