/*

 * 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:  './common/images/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')