function bookmark(b) {
 bookmark_clear();
  document.getElementById("filter"+b).style.display = "block";
  document.getElementById("bmrk_div_"+b).className = "bookmark_a";
  document.getElementById("bmrk_link_"+b).className = "bookmark_a";

  var rightimg =  document.getElementById("bmrk_right_"+b);
  if(rightimg!=null) {
    rightimg.src='/themes/img/bmrk_b_right.gif';
  }

  var leftimg =  document.getElementById("bmrk_left_"+b);
  if(leftimg!=null) {
   leftimg.src='/themes/img/bmrk_b_left.gif';
  }

  var lastimg =  document.getElementById("bmrk_last_"+b);
  if(lastimg!=null) {
    lastimg.src='/themes/img/bmrk_b_last.gif';
  }
}

function bookmark_clear() {
 for(b in bookmark_arr) {
  document.getElementById("filter"+b).style.display = "none";
  document.getElementById("bmrk_div_"+b).className = "bookmark";
  document.getElementById("bmrk_link_"+b).className = "bookmark";

  var rightimg =  document.getElementById("bmrk_right_"+b);
  if(rightimg!=null) {
    rightimg.src='/themes/img/bmrk_g_right.gif';
  }

  var leftimg =  document.getElementById("bmrk_left_"+b);
  if(leftimg!=null) {
   leftimg.src='/themes/img/bmrk_g_left.gif';
  }

  var lastimg =  document.getElementById("bmrk_last_"+b);
  if(lastimg!=null) {
    lastimg.src='/themes/img/bmrk_g_last.gif';
  }

 }
}