// JavaScript Document
function changeDisplay(anchor,url)
{
  var id = anchor.parentNode.id;
  var ulMain = anchor.parentNode.parentNode;
  //var li = anchor.parentNode.style;
  
  for(i=1;i<ulMain.childNodes.length;i+=2)
  {
    var ul = ulMain.childNodes[i];
  
    if (ul.tagName=='LI'&&ul.id==id)
    {
        if(ul.style.listStyleImage=='url(img/minus.gif)')
        {
            ul.style.listStyleImage = 'url("img/plus.gif")';
        }
        else
        {
            ul.style.listStyleImage = 'url("img/minus.gif")';
        }
    }
    if (ul.tagName=='UL'&&ul.id==id)
    {
        if ('none' == ul.style.display || ul.style.display=='' )
        {
            ul.style.display = 'block';
    
        }
        else
        {
            ul.style.display = 'none';
        }
  
    }
  }
  window.location = url;
}