// Manifesto: $Id: global.js,v 1.2 2008/08/31 20:02:21 spud Exp $
// license: GNU LGPL
// copyright 2001-2008: dada typo and contributors

function fixPNG() {
	var arVersion = navigator.appVersion.split("MSIE")
	var version = parseFloat(arVersion[1])
	
	if ((version >= 5.5) && (version < 7) && (document.body.filters)) {
		for(var i=0; i<document.images.length; i++) {
			var img = document.images[i];
			var imgName = img.src.toUpperCase();
			if (imgName.substring(imgName.length-3, imgName.length) == "PNG") {
				var imgID = (img.id) ? "id='" + img.id + "' " : "";
				var imgClass = (img.className) ? "class='" + img.className + "' " : "";
				var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' ";
				var imgStyle = "display:inline-block;" + img.style.cssText;
				if (img.align == "left") imgStyle = "float:left;" + imgStyle;
				if (img.align == "right") imgStyle = "float:right;" + imgStyle;
				if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle;
				var strNewHTML = "<span " + imgID + imgClass + imgTitle
				+ " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
				+ "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
				+ "(src=\'" + img.src + "\', sizingMethod='image');\"></span>";
				img.outerHTML = strNewHTML;
				i = i-1;
			}
		}

		// target specific BACKGROUND images using transparent PNGs on the site
		/*
		ADD CODE TO CHECK FOR MOST COMMON LOCATIONS HERE
		*/
		var bgarr = new Array;
		bgarr[bgarr.length] = 'wrap_pages_1';
		bgarr[bgarr.length] = 'wrap_pages_2';
		bgarr[bgarr.length] = 'wrap_pages_3';
		bgarr[bgarr.length] = 'wrap_pages_4';

		// target specific areas of the site to reduce overhead
		var sidebar = getObjectRef("leftbar");
		var subtags = sidebar.getElementsByTagName("H1");
		for(var i=0;i<subtags.length;i++) {
			bgImg = dtDOM.getStyle(subtags[i],"backgroundImage");
			if (bgImg != "" && bgImg != "none") {
				var bgPNG = bgImg.match(/^url[("']+(.*\.png[^\)"']*)[\)"']+[^\)]*$/i);
				if (bgPNG) bgarr[bgarr.length] = subtags[i];
			}
		}
		
		for(var i=0;i<bgarr.length;i++) {
			var el = getObjectRef(bgarr[i]);
			if (el) {
				txt += "<br />Handing transparency for "+el.tagName;
				var imgURL = dtDOM.getStyle(el,"backgroundImage");
				txt += '<br />fixPNG found '+imgURL;
				var imgURLLength = imgURL.length;
				dtDOM.setStyle(el,"background","");
				dtDOM.setStyle(el,"filter","progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + imgURL.substring(5,imgURLLength  - 2) + "', sizingMethod='crop')");
				dtDOM.setStyle(el,"backgroundImage","url(x.gif)");
				txt += '<br />backgroundImage: '+dtDOM.getStyle(el,"backgroundImage");
			}
		}
		//showSheet(txt,16000);
	}
}