function showGroup(id){
if (document.getElementById("group"+id).className == "category_group_collapsed"){
document.getElementById("group"+id).className = "category_group_expanded";
document.getElementById("cat"+id).className = "category_link_expanded";
} else {
document.getElementById("group"+id).className = "category_group_collapsed";
document.getElementById("cat"+id).className = "category_link_collapsed";
}
}