// Tabs on userpage

var userpage_blocks = [];

var userpage_onload = function()

{

  var wrapper = document.getElementById('userpage_wrap');

  var links = document.getElementById('userpage_links');

  wrapper.className = 'userpage_wrap';

  links.className = 'userpage_links';

  var blocks = wrapper.getElementsByTagName('div');

  var first_block = false;

  for ( var i = 0; i < blocks.length; i++ )

  {

    var block = blocks[i];

    if ( /^tab:/.test(block.id) )

    {

      var block_id = block.id.substr(4);

      userpage_blocks.push(block_id);

      if ( !first_block )

      {

        // this is the first block on the page, memorize it

        first_block = block_id;

      }

    }

  }

  // init links

  var as = links.getElementsByTagName('a');

  for ( var i = 0; i < as.length; i++ )

  {

    var a = as[i];

    if ( a.href.indexOf('#') > -1 )

    {

      var hash = a.href.substr(a.href.indexOf('#'));

      var blockid = hash.substr(5);

      a.blockid = blockid;

      a.onclick = function()

      {

        userpage_select_block(this.blockid);

        return false;

      }

      a.id = 'userpage_blocklink_' + blockid;

    }

  }

  if ( $_REQUEST['tab'] )

  {

    userpage_select_block($_REQUEST['tab'], true);

  }

  else

  {

    userpage_select_block(first_block, true);

  }

}

addOnloadHook(userpage_onload);

/**

 * Select (show) the specified block on the userpage.

 * @param string block name

 * @param bool If true, omits transition effects.

 */

function userpage_select_block(block, nofade)

{

  // memorize existing scroll position, reset the hash, then scroll back to where we were

  // a little hackish and might cause a flash, but it's better than hiding the tabs on each click

  var currentScroll = getScrollOffset();

  var current_block = false;

  nofade = true;

  for ( var i = 0; i < userpage_blocks.length; i++ )

  {

    var div = document.getElementById('tab:' + userpage_blocks[i]);

    if ( div )

    {

      if ( div.style.display != 'none' )

      {

        current_block = userpage_blocks[i];

        if ( nofade || aclDisableTransitionFX )

        {

          div.style.display = 'none';

        }

      }

    }

    var a = document.getElementById('userpage_blocklink_' + userpage_blocks[i]);

    if ( a )

    {

      {

      }

    }

  }

  if ( nofade || !current_block || aclDisableTransitionFX )

  {

    var div = document.getElementById('tab:' + block);

    div.style.display = 'block';

  }

  else

  {

    // do this in a slightly fancier fashion

  }

  var a = document.getElementById('userpage_blocklink_' + block);

  window.location.hash = 'tab:' + block;

  setScrollOffset(currentScroll);

}