function showHide( target) {
    if( document.getElementById(target).style.display=='' || document.getElementById(target).style.display=='none' ) {
        document.getElementById(target).style.display='block';
        document.getElementById("Link"+target).className = "minus";
    }
    else
    {
        document.getElementById(target).style.display='none';
        document.getElementById("Link"+target).className = "plus";
    }
}

function DropDownListChange(options, selected) {
  for (x = 0; x < options.length; x++)
  {
    if (options[x].value != null)
        if (options[x].value != "")
            if (document.getElementById(options[x].value) != null)
                document.getElementById(options[x].value).style.display = "none";
  }
  if (selected != null)
    if (selected != "")
        document.getElementById(selected).style.display = "block";
}