/*

 * The jBox menu system. Written by Dan Fuhry and licensed under the GPL.

 */

// Cache of DOM and event objects, used in setTimeout() calls due to scope rules

var jBoxObjCache = new Object();

// Cache of "correct" heights for unordered list objects used in submenus. Helps the animation routine know what height it's aiming for.

var jBoxMenuHeights = new Object();

// Blocks animations from running if there's already an animation going on the same object

var jBoxSlideBlocker = new Object();

// Speed at which the menus should slide open. 1 to 100 or -1 to disable.

// Setting this higher than 100 will cause an infinite loop in the browser.

// Default is 80 - anything higher than 90 means exponential speed increase

var slide_speed = 80;

// Inertia value to start with

// Default is 0

var inertia_base = 0;

// Value added to inertia_base on each frame - generally 1 to 3 is good, with 1 being slowest animation

// Default is 1

var inertia_inc  = 1;

// Opacity that menus should fade to. 1 to 100 or -1 to disable fades. This only works if the slide effect is also enabled.

// Default is 100

var jBox_opacity = 100;

// Adds the jBox CSS to the HTML header. Called on window onload.

function jBoxInit()

{

  setTimeout('jBoxBatchSetup();', 200);

}

// Initializes each menu.

function jBoxBatchSetup()

{

  var menus = document.getElementsByClassName('div', 'menu_nojs');

  if ( menus.length > 0 )

  {

    for ( var i in menus )

    {

      if ( typeof(menus[i]) != 'object')

        continue; // toJSONString() compatibility

      jBoxSetup(menus[i]);

    }

  }

}

// Initializes a div with a jBox menu in it.

function jBoxSetup(obj)

{

  $(obj).addClass('menu');

  removeTextNodes(obj);

  for ( var i in obj.childNodes )

  {

    /* normally this would be done in about 2 lines of code, but javascript is so picky..... */

    if ( obj.childNodes[i] )

    {

      if ( obj.childNodes[i].tagName )

      {

        if ( obj.childNodes[i].tagName.toLowerCase() == 'a' )

        {

          if ( obj.childNodes[i].nextSibling.tagName )

          {

            if ( obj.childNodes[i].nextSibling.tagName.toLowerCase() == 'ul' || ( obj.childNodes[i].nextSibling.tagName.toLowerCase() == 'div' && obj.childNodes[i].nextSibling.className == 'submenu' ) )

            {

              // Calculate height

              var ul = obj.childNodes[i].nextSibling;

              domObjChangeOpac(0, ul);

              ul.style.display = 'block';

              var dim = fetch_dimensions(ul);

              if ( !ul.id )

                ul.id = 'jBoxmenuobj_' + Math.floor(Math.random() * 10000000);

              jBoxMenuHeights[ul.id] = parseInt(dim['h']) - 2; // subtract 2px for border width

              ul.style.display = 'none';

              domObjChangeOpac(100, ul);

              // Setup events

              obj.childNodes[i].onmouseover = function()  { jBoxOverHandler(this); };

              obj.childNodes[i].onmouseout = function(e)  { jBoxOutHandler(this, e); };

              obj.childNodes[i].nextSibling.onmouseout = function(e)  { jBoxOutHandler(this, e); };

            }

          }

        }

      }

    }

  }

}

// Called when user hovers mouse over a submenu

function jBoxOverHandler(obj)

{

  // Random ID used to track the object to perform on

  var seed = Math.floor(Math.random() * 1000000);

  jBoxObjCache[seed] = obj;

  // Sleep for a (little more than a tenth of a) second to see if the user really wants the menu to expand

  setTimeout('if(isOverObj(jBoxObjCache['+seed+'], false, false)) jBoxOverHandlerBin(jBoxObjCache['+seed+']);', 150);

}

// Displays a menu.

function jBoxOverHandlerBin(obj)

{

  var others = obj.parentNode.getElementsByTagName('ul');

  for ( var i in others )

  {

    if(typeof(others[i]) == 'object')

    {

      others[i].style.display = 'none';

      others[i].previousSibling.className = '';

    }

  }

  var others = obj.parentNode.getElementsByTagName('div');

  for ( var i in others )

  {

    if(typeof(others[i]) == 'object')

    {

      if ( others[i].className == 'submenu' )

      {

        others[i].style.display = 'none';

        others[i].previousSibling.className = '';

      }

    }

  }

  if(obj.nextSibling.tagName.toLowerCase() == 'ul' || ( obj.nextSibling.tagName.toLowerCase() == 'div' && obj.nextSibling.className == 'submenu' ))

  {

    obj.className = 'liteselected';

    var ul = obj.nextSibling;

    var dim = fetch_dimensions(obj);

    var off = fetch_offset(obj);

    var dimh = parseInt(dim['h']);

    var offtop = parseInt(off['top']);

    var top = dimh + offtop;

    left = off['left'];

    ul.style.left = left + 'px';

    ul.style.top = top + 'px';

    ul.style.clip = 'rect(auto,auto,auto,auto)';

    ul.style.overflow = 'visible';

    ul.style.display = 'block';

  }

}

function jBoxOutHandler(obj, event)

{

  var seed = Math.floor(Math.random() * 1000000);

  var seed2 = Math.floor(Math.random() * 1000000);

  jBoxObjCache[seed] = obj;

  jBoxObjCache[seed2] = event;

  setTimeout('jBoxOutHandlerBin(jBoxObjCache['+seed+'], jBoxObjCache['+seed2+']);', 750);

}

function jBoxOutHandlerBin(obj, event)

{

  var caller = obj.tagName.toLowerCase();

  if(caller == 'a')

  {

    a = obj;

    ul = obj.nextSibling;

  }

  else if(caller == 'ul' || caller == 'div')

  {

    a = obj.previousSibling;

    ul = obj;

  }

  else

  {

    return false;

  }

  if (!isOverObj(a, false, event) && !isOverObj(ul, true, event))

  {

    a.className = '';

    slideIn(ul);

  }

  return true;

}

// Slide an element downwards until it is at full height.

// First parameter should be a DOM object with style.display = block and opacity = 0.

var sliderobj = new Object();

function slideOut(obj)

{

  if ( jBoxSlideBlocker[obj.id] )

    return false;

  jBoxSlideBlocker[obj.id] = true;

  if ( slide_speed == -1 )

  {

    obj.style.display = 'block';

    return false;

  }

  var currentheight = 0;

  var targetheight = jBoxMenuHeights[obj.id];

  var inertiabase = inertia_base;

  var inertiainc = inertia_inc;

  slideStep(obj, 0);

  domObjChangeOpac(100, obj);

  obj.style.overflow = 'hidden';

  // Don't edit past here

  var timercnt = 0;

  var seed = Math.floor(Math.random() * 1000000);

  sliderobj[seed] = obj;

  var framecnt = 0;

  while(true)

  {

    framecnt++;

    timercnt += ( 100 - slide_speed );

    inertiabase += inertiainc;

    currentheight += inertiabase;

    if ( currentheight > targetheight )

      currentheight = targetheight;

    setTimeout('slideStep(sliderobj['+seed+'], '+currentheight+', '+targetheight+');', timercnt);

    if ( currentheight >= targetheight )

      break;

  }

  timercnt = timercnt + ( 100 - slide_speed );

  setTimeout('jBoxSlideBlocker[sliderobj['+seed+'].id] = false;', timercnt);

  var opacstep = jBox_opacity / framecnt;

  var opac = 0;

  var timerstep = 0;

  domObjChangeOpac(0, obj);

  while(true)

  {

    timerstep += ( 100 - slide_speed );

    opac += opacstep;

    setTimeout('domObjChangeOpac('+opac+', sliderobj['+seed+']);', timerstep);

    if ( opac >= jBox_opacity )

      break;

  }

}

function slideIn(obj)

{

  if ( obj.style.display != 'block' )

    return false;

  if ( jBoxSlideBlocker[obj.id] )

    return false;

  jBoxSlideBlocker[obj.id] = true;

  var targetheight = 0;

  var dim = fetch_dimensions(obj);

  var currentheight = jBoxMenuHeights[obj.id];

  var origheight = currentheight;

  var inertiabase = inertia_base;

  var inertiainc = inertia_inc;

  domObjChangeOpac(100, obj);

  obj.style.overflow = 'hidden';

  // Don't edit past here

  var timercnt = 0;

  var seed = Math.floor(Math.random() * 1000000);

  sliderobj[seed] = obj;

  var framecnt = 0;

  for(var j = 0;j<100;j++) // while(true)

  {

    framecnt++;

    timercnt = timercnt + ( 100 - slide_speed );

    inertiabase = inertiabase + inertiainc;

    currentheight = currentheight - inertiabase;

    if ( currentheight < targetheight )

      currentheight = targetheight;

    setTimeout('slideStep(sliderobj['+seed+'], '+currentheight+');', timercnt);

    if ( currentheight <= targetheight )

      break;

  }

  timercnt += ( 100 - slide_speed );

  setTimeout('sliderobj['+seed+'].style.display="none";sliderobj['+seed+'].style.height="'+origheight+'px";jBoxSlideBlocker[sliderobj['+seed+'].id] = false;', timercnt);

  var opacstep = jBox_opacity / framecnt;

  var opac = jBox_opacity;

  var timerstep = 0;

  domObjChangeOpac(100, obj);

  while(true)

  {

    timerstep += ( 100 - slide_speed );

    opac -= opacstep;

    setTimeout('domObjChangeOpac('+opac+', sliderobj['+seed+']);', timerstep);

    if ( opac <= 0 )

      break;

  }

}

function slideStep(obj, height, maxheight)

{

  obj.style.height = height + 'px';

  //obj.style.clip = 'rect(3px,auto,'+maxheight+'px,auto)';

  obj.style.overflow = 'hidden';

  //obj.style.clip = 'rect('+height+'px,0px,'+maxheight+'px,auto);';

}

function isOverObj(obj, bias, event)

{

  var fieldUL = new Object();

  var dim = fetch_dimensions(obj);

  var off = fetch_offset(obj);

  fieldUL['top'] = off['top'];

  fieldUL['left'] = off['left'];

  fieldUL['right'] = off['left'] + dim['w'];

  fieldUL['bottom'] = off['top'] + dim['h'];

  //document.getElementById('debug').innerHTML = '<br /><br /><br /><br /><br />Mouse: x: '+mouseX+', y:' + mouseY + '<br />'; // + document.getElementById('debug').innerHTML;

  if(bias)

  {

    if ( ( mouseX < fieldUL['left'] + 2 || mouseX > fieldUL['right']  - 5 ) ||

         ( mouseY < fieldUL['top']  - 2 || mouseY > fieldUL['bottom'] - 2 ) )

    {

       return false;

    }

  }

  else

  {

    if ( ( mouseX < fieldUL['left'] || mouseX > fieldUL['right']  ) ||

         ( mouseY < fieldUL['top']  || mouseY > fieldUL['bottom'] ) )

       return false;

  }

  return true;

  /*

  var tgt = event.target;

  if ( !tgt )

    return false;

  do {

    if ( tgt == obj )

      return true;

    tgt = tgt.parentNode;

  } while (tgt.tagName.toLowerCase() != 'body' );

  return false;

  */

}

function jBoxGarbageCollection(e)

{

  setMousePos(e);

  var menus = document.getElementsByClassName('div', 'menu');

  if ( menus.length > 0 )

  {

    for ( var i in menus )

    {

      if ( typeof(menus[i]) != 'object')

        continue; // toJSONString() compatibility

      var uls = menus[i].getElementsByTagName('ul');

      if ( uls.length > 0 )

      {

        for ( var j = 0; j < uls.length; j++ )

        {

          if ( !isOverObj(uls[j], false, e) )

          {

            uls[j].previousSibling.className = '';

            //uls[j].style.display = 'none';

            slideIn(uls[j]);

          }

        }

      }

      var uls = getElementsByClassName(menus[i], 'divs', 'submenu');

      if ( uls.length > 0 )

      {

        for ( var j = 0; j < uls.length; j++ )

        {

          if ( !isOverObj(uls[j], false, e) )

          {

            uls[j].previousSibling.className = '';

            //uls[j].style.display = 'none';

            slideIn(uls[j]);

          }

        }

      }

    }

  }

}

document.onclick = jBoxGarbageCollection;

function removeTextNodes(obj)

{

  if(obj)

  {

    if(typeof(obj.tagName) != 'string')

    {

      if ( obj.nodeType == 3 && obj.data.match(/^([\s]*)$/ig) ) 

      {

        obj.parentNode.removeChild(obj);

        return;

      }

    }

    if(obj.firstChild)

    {

      for(var i in obj.childNodes)

      {

        removeTextNodes(obj.childNodes[i]);

      }

    }

  }

}

var getElementsByClassName = function(parent, type, cls) {

  if(!type)

    type = '*';

  ret = new Array();

  el = parent.getElementsByTagName(type);

  for ( var i in el )

  {

    if ( typeof(el[i]) != 'object')

      continue; // toJSONString() compatibility

    if(el[i].className)

    {

      if(el[i].className.indexOf(' ') > 0)

      {

        classes = el[i].className.split(' ');

      }

      else

      {

        classes = new Array();

        classes.push(el[i].className);

      }

      if ( in_array(cls, classes) )

        ret.push(el[i]);

    }

  }

  return ret;

}

document.getElementsByClassName = function(type, cls) {

  return getElementsByClassName(document, type, cls);

}

function setMousePos(event)

{

  if(IE)

  {

    if(!event)

    {

      event = window.event;

    }

    clX = event.clientX;

    sL  = document.body.scrollLeft;

    mouseX = clX + sL;

    mouseY = event.clientY + document.body.scrollTop;

    return;

  }

  if( typeof(event.clientX) == 'number' )

  {

    mouseX = event.clientX;

    mouseY = event.clientY;

    return;

  }

  else if( typeof(event.layerX) == 'number' )

  {

    mouseX = event.layerX;

    mouseY = event.layerY;

    return;

  }

  else if( typeof(event.offsetX) == 'number' )

  {

    mouseX = event.offsetX;

    mouseY = event.offsetY;

    return;

  }

  else if( typeof(event.screenX) == 'number' )

  {

    mouseX = event.screenX;

    mouseY = event.screenY;

    return;

  }

  else if( typeof(event.x) == 'number' )

  {

    mouseX = event.x;

    mouseY = event.y;

    return;

  }

}

document.onmousemove = function(e)

{

  setMousePos(e);

};

function domObjChangeOpac(opacity, id) {

    var object = id.style;

    object.opacity = (opacity / 100);

    object.MozOpacity = (opacity / 100);

    object.KhtmlOpacity = (opacity / 100);

    object.filter = "alpha(opacity=" + opacity + ")";

}