/**
 * --------------------------------------------------------------------
 * jQuery-Plugin "pngFix"
 * Version: 1.1, 11.09.2007
 * by Andreas Eberhard, andreas.eberhard@gmail.com
 *                      http://jquery.andreaseberhard.de/
 *
 * Copyright (c) 2007 Andreas Eberhard
 * Licensed under GPL (http://www.opensource.org/licenses/gpl-license.php)
 *
 * Changelog:
 *    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
 * --------------------------------------------------------------------
 */

(function($) {

  jQuery.fn.pngFix = function(settings) {

    // Settings
    settings = jQuery.extend({
      blankgif: 'blank.gif'
    }, settings);

    var ie55 = (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) == 4 && navigator.appVersion.indexOf("MSIE 5.5") != -1);
    var ie6 = (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) == 4 && navigator.appVersion.indexOf("MSIE 6.0") != -1);

    if (jQuery.browser.msie && (ie55 || ie6)) {

      //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 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=\'scale\');';
        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');
        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='scale')";
        }
      });

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

    }

    return jQuery;

  };

})(jQuery);