Linux, Apache, MySQL, PHP

<?php
$url = $_SERVER['REQUEST_URI'];
$dir = trim(dirname($url), '/');

<?php
$url = $_SERVER['REQUEST_URI'];
$parts = explode('/', trim($url, '/'));
$dir = $parts[0];

function focusOn(elementId) {
   getElementById(elementId).focus();
}

display:none

function toggle(id)
  {
    var e = document.getElementById(id);
    if(e.style.display == 'block')
    {
      e.style.display = 'none';
      e.focus();
    }
    else
    {
      e.style.display = 'block';
      e.focus();
    }
  }

function toggle(toggleId, focusId)
  {
    var e = document.getElementById(toggleId);
    var f = document.getElementById(focusId);
    if(e.style.display == 'block')
    {
      e.style.display = 'none';
      f.focus();
    }
    else
    {
      e.style.display = 'block';
      f.focus();
    }
  }

<a href="#" onclick="function();return false">Link</a>

<a href="#" onclick="return function();">Link</a>