// Test passed with:
// - Mozilla 0.8.1 to 1.0-RC1 for Windows (js enabled & disabled)
// - IE5, 5.01, 5.5, 6.0 for Windows
// - Netscape 4.75 to 4.78 for Windows

// Test failed (crappy DOM implementations) with:
// - Opera 5.02 for windows: 'getElementsByTagName' is unsupported
// - Opera 5.10 to 6.01 for windows, Opera 5+ for Linux: 'style.display' can't
//   be changed
// - Konqueror 2+, 3: 'style.display' can't be changed

// init code for our menu
var isDOM      = (typeof(document.getElementsByTagName) != 'undefined'
                 && typeof(document.createElement) != 'undefined')
                   ? 1 : 0;
var isIE4      = (typeof(document.all) != 'undefined'
                      && parseInt(navigator.appVersion) >= 4)
                   ? 1 : 0;
var isNS4      = (typeof(document.layers) != 'undefined')
                   ? 1 : 0;
var capable    = (isDOM || isIE4 || isNS4)
                   ? 1 : 0;
				   
// Ugly fix for Opera and Konqueror that are half DOM compliant
if (capable) {
   if (typeof(window.opera) != 'undefined') {
   		capable = 0;
   } else if (typeof(navigator.userAgent) != 'undefined') {
        var browserName = navigator.userAgent.toLowerCase();
        if (browserName.indexOf('konqueror') >= 0) {
            capable = 0;
        }
   } 
}

var imgOpened    = new Image(7,7);
imgOpened.src    = '/icons/menu_expanded.gif';
var imgClosed    = new Image(7,7);
imgClosed.src    = '/icons/menu_contracted.gif';

/**
 * Do reloads the frame if the window has been resized under Netscape4+
 *
 * @access  private
 */
function reDo() {
  if (innerWidth != origWidth || innerHeight != origHeight)
    location.reload(true);
} // end of the 'reDo()' function

/**
 * Positioned element resize bug under NS4+
 */
if (isNS4) {
  var origWidth  = innerWidth;
  var origHeight = innerHeight;
  onresize       = reDo;
}

/**
 * Gets the id of the first collapsible room
 *
 * @param  string  the name of the first collapsible room
 *
 * @return  integer  the index number corresponding to this room
 *
 * @access  public
 */
function nsGetIndex(el) {
  var ind       = null;
  var theLayers = document.layers;
  var layersCnt = theLayers.length;
  for (var i = 0; i < layersCnt; i++) {
    if (theLayers[i].id == el) {
      ind = i;
      break;
    }
  }
  return ind;
} // end of the 'nsGetIndex()' function


/**
 * Positions layers under NS4+
 *
 * @access  public
 */
function nsArrangeList() {
  if (typeof(firstInd) != 'undefined' && firstInd != null) {
    var theLayers = document.layers;
    var layersCnt = theLayers.length;
    var nextY     = theLayers[firstInd].pageY + theLayers[firstInd].document.height;
    for (var i = firstInd + 1; i < layersCnt; i++) {
      if (theLayers[i].visibility != 'hide') {
        theLayers[i].pageY = nextY;
        nextY              += theLayers[i].document.height;
      }
    }
  }
} // end of the 'nsArrangeList()' function


/**
 * Expand databases at startup
 *
 * @access  public
 */
function nsShowAll() {
  var theLayers = document.layers;
  var layersCnt = theLayers.length;
  for (i = firstInd; i < layersCnt; i++) {
    theLayers[i].visibility = 'show';
  }
} // end of the 'nsShowAll()' function


/**
 * Collapses databases at startup
 *
 * @access  public
 */
function initMenu()
{
  if (!capable)
    return;

  var tempColl    = null;
  var tempCollCnt = null;
  var i           = 0;

  if (isDOM) {
    tempColl    = document.getElementsByTagName('DIV');
    tempCollCnt = tempColl.length;
    for (i = 0; i < tempCollCnt; i++) {
      if (tempColl[i].className == 'elShow')
        tempColl[i].style.display = 'block';
      else if (tempColl[i].className == 'elHide')
        tempColl[i].style.display = 'none';
    }
  } // end of the DOM case
  else if (isIE4) {
    tempColl    = document.all.tags('DIV');
    tempCollCnt = tempColl.length;
    for (i = 0; i < tempCollCnt; i++) {
      if (tempColl(i).className == 'elShow')
        tempColl(i).style.display = 'block';
      else if (tempColl(i).className == 'elHide')
        tempColl(i).style.display = 'none';
    }
  } // end of the IE4 case
  else if (isNS4) {
    var theLayers  = document.layers;
    var layersCnt  = theLayers.length;
    for (i = 0; i < layersCnt; i++) {
// FIX ME: make netscape honour the 'elShow' class name
	  if (theLayers[i].id.indexOf('Child') != -1)
        theLayers[i].visibility   = 'hide';
      else
        theLayers[i].visibility   = 'show';
    }
    nsArrangeList();
  } // end of the NS4 case
} // end of the 'initIt()' function

/**
 * Collapses/expands a database when the user require this to be done
 *
 * @param  string  the name of the database to act on
 * @param  boolean whether to expand or to collapse the database content
 *
 * @access  public
 */
function expandBase(el, unexpand)
{
  if (!capable)
    return;

  var whichEl = null;
  var whichIm = null;

  if (isDOM) {
    whichEl = document.getElementById(el + 'Child');
    whichIm = document.getElementById(el + 'Img');
    if (whichEl.style.display == 'none' && whichIm) {
      whichEl.style.display  = 'block';
      whichIm.src            = imgOpened.src;
      whichIm.width	     = 7;
      whichIm.height	 = 7;
    }
    else if (unexpand) {
      whichEl.style.display  = 'none';
      whichIm.src            = imgClosed.src;
      whichIm.width	     = 7;
      whichIm.height	 = 7;
    }
  } // end of the DOM case
  else if (isIE4) {
    whichEl = document.all(el + 'Child');
    whichIm = document.images.item(el + 'Img');
    if (whichEl.style.display == 'none') {
      whichEl.style.display  = 'block';
      whichIm.src            = imgOpened.src;
      whichIm.width	     = 7;
      whichIm.height	 = 7;
    }
    else if (unexpand) {
      whichEl.style.display  = 'none';
      whichIm.src            = imgClosed.src;
      whichIm.width	     = 7;
      whichIm.height	 = 7;
    }
  } // end of the IE4 case
  else if (isNS4) {
    whichEl = document.layers[el + 'Child'];
    whichIm = document.layers[el + 'Parent'].document.images['imEx'];
    if (whichEl.visibility == 'hide') {
      whichEl.visibility  = 'show';
      whichIm.src         = imgOpened.src;
      whichIm.width	     = 7;
      whichIm.height	 = 7;
    }
    else if (unexpand) {
      whichEl.visibility  = 'hide';
      whichIm.src         = imgClosed.src;
      whichIm.width	     = 7;
      whichIm.height	 = 7;
    }
    nsArrangeList();
  } // end of the NS4 case
} // end of the 'expandBase()' function


/**
 * Hilight/un-hilight a database when the mouse pass over/out it
 *
 * @param  string  the name of the database to act on
 * @param  boolean the color to be used
 *
 * @access  public
 */
function hilightBase(el, theColor)
{
  if (!isDOM && !isIE4) {
    return null;
  }

  var whichDb     = null;
  var whichTables = null;

  if (isDOM) {
    whichDb       = document.getElementById(el + 'Parent');
    whichTables   = document.getElementById(el + 'Child');
  }
  else if (isIE4) {
    whichDb       = document.all(el + 'Parent');
    whichTables   = document.all(el + 'Child');
  }

  if (typeof(whichDb.style) == 'undefined') {
    return null;
  }
  else if (whichTables) {
    whichDb.style.backgroundColor     = theColor;
    whichTables.style.backgroundColor = theColor;
  }
  else {
    whichDb.style.backgroundColor     = theColor;
  }

  return true;
} // end of the 'hilightBase()' function

window.onload = initMenu;