/*
 * IE PNG Fix v1.4
 *
 * Copyright (c) 2006 Takashi Aida http://www.isella.com/aod2/
 *
 */

// IE5.5+ PNG Alpha Fix v1.0RC4
// (c) 2004-2005 Angus Turnbull http://www.twinhelix.com

// This is licensed under the CC-GNU LGPL, version 2.1 or later.
// For details, see: http://creativecommons.org/licenses/LGPL/2.1/

if (typeof IEPNGFIX == 'undefined') {
//--============================================================================

var IEPNGFIX = {
 blank:  'floatbn/imgs/blank.gif',
 filter: 'DXImageTransform.Microsoft.AlphaImageLoader',

 fixit: function (elem, src, method) {
  if (elem.filters[this.filter]) {
   var filter = elem.filters[this.filter];
   filter.enabled = true;
   filter.src = src;
   filter.sizingMethod = method;
  }
  else {
   elem.style.filter = 'progid:' + this.filter +
    '(src="' + src + '",sizingMethod="' + method + '")';
  }
 },

 fixwidth: function(elem) {
  if (elem.currentStyle.width == 'auto' &&
   elem.currentStyle.height == 'auto') {
   elem.style.width = elem.offsetWidth + 'px';
  }
 },

 fixchild: function(elem, recursive) {
  if (!/MSIE (5\.5|6\.|7\.)/.test(navigator.userAgent)) return;

  for (var i = 0, n = elem.childNodes.length; i < n; i++) {
   var childNode = elem.childNodes[i];
   if (childNode.style) {
    if (childNode.style.position) {
     childNode.style.position = childNode.style.position;
    }
    else {
     childNode.style.position = 'relative';
    }
   }
   if (recursive && childNode.hasChildNodes()) {
    this.fixchild(childNode, recursive);
   }
  }
 },

 fix: function(elem) {
  if (!/MSIE (5\.5|6\.|7\.)/.test(navigator.userAgent)) return;

  var bgImg =
   elem.currentStyle.backgroundImage || elem.style.backgroundImage;

  if (elem.tagName == 'IMG') {
   if ((/\.png$/i).test(elem.src)) {
    this.fixwidth(elem);
    this.fixit(elem, elem.src, 'scale');
    elem.src = this.blank;
    elem.runtimeStyle.behavior = 'none';
   }
  }
  else if (bgImg && bgImg != 'none') {
   if (bgImg.match(/^url[("']+(.*\.png)[)"']+$/i)) {
    var s = RegExp.$1;
    this.fixwidth(elem);
    elem.style.backgroundImage = 'none';
    this.fixit(elem, s, 'scale'); // crop | image | scale

    if (elem.tagName == 'A' && elem.style) {
     if (!elem.style.cursor) {
      elem.style.cursor = 'pointer';
     }
    }

    this.fixchild(elem);
    elem.runtimeStyle.behavior = 'none';
   }
  }
 },

 hover: function(elem, hvImg) {
  var bgImg = elem.style.backgroundImage;

  if (!bgImg && elem.currentStyle) bgImg = elem.currentStyle.backgroundImage;

  if (elem.tagName == 'IMG' && hvImg) {
   var image = elem.src;
   elem.onmouseover = function() {
    elem.src = hvImg;
    IEPNGFIX.fix(elem);
   };
   elem.onmouseout = function() {
    elem.src = image;
    IEPNGFIX.fix(elem);
   };
  }
  else if (bgImg && bgImg != 'none' && hvImg) {
   elem.onmouseover = function() {
    elem.style.backgroundImage = 'url(' + hvImg + ')';
    IEPNGFIX.fix(elem);
   };
   elem.onmouseout = function() {
    elem.style.backgroundImage = bgImg;
    IEPNGFIX.fix(elem);
   };
  }

  IEPNGFIX.fix(elem);
 }
};

//--============================================================================
} // end if (typeof IEPNGFIX == 'undefined')