function expandMenu(x,y,z)
{

var schoolsArrow = document.getElementById('main1arrow');
var villagesArrow = document.getElementById('main2arrow');
var projectsArrow = document.getElementById('main3arrow');

var down = '<img src="images/arrow-down-orange.gif" width="11" height="11" border="0" align="absmiddle">';

var up = '<img src="images/arrow-up-blue.gif" width="11" border="0" align="absmiddle">';

  if(document.getElementById(x).style.display == 'block')
  {
    document.getElementById(x).style.display = 'none';

    if(x == 'sub1')
    {
      schoolsArrow.innerHTML = down;
    }

    if(x == 'sub2')
    {
      villagesArrow.innerHTML = down;
    }

    if(x == 'sub3')
    {
      projectsArrow.innerHTML = down;
    }

  }
    else
    {
      document.getElementById(x).style.display = 'block';

      if(x == 'sub1')
      {
        schoolsArrow.innerHTML = up;
      }

      if(x == 'sub2')
      {
        villagesArrow.innerHTML = up;
      }

      if(x == 'sub3')
      {
        projectsArrow.innerHTML = up;
      }
    }
      if(document.getElementById(y).style.display == 'block')
      {
        document.getElementById(y).style.display = 'none';

        if(y == 'sub1')
        {
          schoolsArrow.innerHTML = down;
        }

        if(y == 'sub2')
        {
          villagesArrow.innerHTML = down;
        }

        if(y == 'sub3')
        {
          projectsArrow.innerHTML = down;
        }
      }
        if(document.getElementById(z).style.display == 'block')
        {
          document.getElementById(z).style.display = 'none';

          if(z == 'sub1')
          {
            schoolsArrow.innerHTML = down;
          }

          if(z == 'sub2')
          {
            villagesArrow.innerHTML = down;
          }

          if(z == 'sub3')
          {
            projectsArrow.innerHTML = down;
          }
        }

}