var node    = new Array('main', 'content', 'account', 'admin');
function toggleVis(id)
{
   var font_color1 = '#597944';
   var font_color2 = '#fff';
   var bg_color1    = '#fff';
   var bg_color2    = '#8CAC77';
   var bound = node.length;
   for(var i = 0; i < bound; i++){
     var subnode = document.getElementById('sub-'+node[i]);
     var topnode = document.getElementById(node[i]);
     if(node[i] == id){
       subnode.style.display = 'block';
       topnode.style.backgroundColor = bg_color2;
       topnode.style.color = font_color2;
       topnode.style.textDecoration =  'underline';
     }else{
       subnode.style.display = 'none';
       topnode.style.backgroundColor = bg_color1;
       topnode.style.color = font_color1;
       topnode.style.textDecoration =  'none';
     }
  }
}

