/**
* --------------------------------------------------------------------
* jQuery-Plugin "pngFix" (valley edition)
* Version: 1.0, 16-02-2009
* by Lucien Immink, lucien@thevalley.nl
* http://www.thevalley.nl
*
* Copyright (c) 2009 Lucien Immink
* Licensed under GPL (http://www.opensource.org/licenses/gpl-license.php)
*
* Changelog:
* 16-02-2009 Version 1.0
* - Revamped to "valley edition"
* - Added class listener to get scaling method
* - rewrote browser checking code (* note this is deprecated in jQuery 1.3)
*
* Version history jquery.PNGFix.js by Andreas Eberhard, andreas.eberhard@gmail.com
* 06-02-2009 Version 1.1.1
* - fixed for jQuery 1.3 (Lucien Immink, the people's valley)
* 11.09.2007 Version 1.1
* - removed noConflict
* - added png-support for input type=image
* - 01.08.2007 CSS background-image support extension added by Scott Jehl, scott@filamentgroup.com, http://www.filamentgroup.com
* 31.05.2007 initial Version 1.0
* --------------------------------------------------------------------
* @example $(function(){$(document).pngFix();});
* @desc Fixes all PNG's in the document on document.ready
*
* jQuery(function(){jQuery(document).pngFix();});
* @desc Fixes all PNG's in the document on document.ready when using noConflict
*
* @example $(function(){$('div.examples').pngFix();});
* @desc Fixes all PNG's within div with class examples
*
* @example $(function(){$('div.examples').pngFix( { blankgif:'ext.gif' } );});
* @desc Fixes all PNG's within div with class examples, provides blank gif for input with png
* --------------------------------------------------------------------
*/
jQuery.fn.pngFix = function(settings) {
	// Settings
	settings = jQuery.extend({
		blankgif: 'blank.gif'
	}, settings);
	if (jQuery.browser.msie && jQuery.browser.version < 7) {
		//fix images with png-source
		jQuery(this).find("img[src$=.png]").each(function() {
			jQuery(this).attr('width', jQuery(this).width());
			jQuery(this).attr('height', jQuery(this).height());
			var prevStyle = '';
			var strNewHTML = '';
			var imgId = (jQuery(this).attr('id')) ? 'id="' + jQuery(this).attr('id') + '" ' : '';
			var imgClass = (jQuery(this).attr('class')) ? 'class="' + jQuery(this).attr('class') + '" ' : '';
			var sizingMethod = getIE6Style(imgClass);
			var imgTitle = (jQuery(this).attr('title')) ? 'title="' + jQuery(this).attr('title') + '" ' : '';
			var imgAlt = (jQuery(this).attr('alt')) ? 'alt="' + jQuery(this).attr('alt') + '" ' : '';
			var imgAlign = (jQuery(this).attr('align')) ? 'float:' + jQuery(this).attr('align') + ';' : '';
			var imgHand = (jQuery(this).parent().attr('href')) ? 'cursor:hand;' : '';
			if (this.style.border) {
				prevStyle += 'border:' + this.style.border + ';';
				this.style.border = '';
			}
			if (this.style.padding) {
				prevStyle += 'padding:' + this.style.padding + ';';
				this.style.padding = '';
			}
			if (this.style.margin) {
				prevStyle += 'margin:' + this.style.margin + ';';
				this.style.margin = '';
			}
			var imgStyle = (this.style.cssText);
			strNewHTML += '<span ' + imgId + imgClass + imgTitle + imgAlt;
			strNewHTML += 'style="position:relative;white-space:pre-line;display:inline-block;background:transparent;' + imgAlign + imgHand;
			strNewHTML += 'width:' + jQuery(this).width() + 'px;' + 'height:' + jQuery(this).height() + 'px;';
			strNewHTML += 'filter:progid:DXImageTransform.Microsoft.AlphaImageLoader' + '(src=\'' + jQuery(this).attr('src') + '\', sizingMethod=\'' + sizingMethod + '\');';
			strNewHTML += imgStyle + '"></span>';
			if (prevStyle != '') {
				strNewHTML = '<span style="position:relative;display:inline-block;' + prevStyle + imgHand + 'width:' + jQuery(this).width() + 'px;' + 'height:' + jQuery(this).height() + 'px;' + '">' + strNewHTML + '</span>';
			}
			jQuery(this).hide();
			jQuery(this).after(strNewHTML);
		});
		// fix css background pngs
		jQuery(this).find("*").each(function() {
			var bgIMG = jQuery(this).css('background-image');
			var imgClass = jQuery(this).attr('class');
			var sizingMethod = getIE6Style(imgClass);
			if (bgIMG.indexOf(".png") != -1) {
				var iebg = bgIMG.split('url("')[1].split('")')[0];
				jQuery(this).css('background-image', 'none');
				jQuery(this).get(0).runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + iebg + "',sizingMethod='" + sizingMethod + "')";
			}
		});

		//fix input with png-source
		jQuery(this).find("input[src$=.png]").each(function() {
			var bgIMG = jQuery(this).attr('src');
			var imgClass = jQuery(this).attr('class');
			var sizingMethod = getIE6Style(imgClass);
			jQuery(this).get(0).runtimeStyle.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader' + '(src=\'' + bgIMG + '\', sizingMethod=\'' + sizingMethod + '\');';
			jQuery(this).attr('src', settings.blankgif)
		});

	}

	return jQuery(this);
};

function getIE6Style(imgClass) {
	var sizingMethod = '';
	if (imgClass.indexOf("ie6scale") > -1) {
		sizingMethod = "scale";
	} else if (imgClass.indexOf("ie6crop") > -1) {
		sizingMethod = "crop";
	} else {
		sizingMethod = "scale";
	}
	return sizingMethod;
}