/*
 * 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:  'http://www.yano-seikotsuin.net/image/all/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')