/**
 * DD_belatedPNG: Adds IE6 support: PNG images for CSS background-image and HTML <IMG/>.
 * Author: Drew Diller
 * Email: drew.diller@gmail.com
 * URL: http://www.dillerdesign.com/experiment/DD_belatedPNG/
 * Version: 0.0.8a
 * Licensed under the MIT License: http://dillerdesign.com/experiment/DD_belatedPNG/#license
 *
 * Example usage:
 * DD_belatedPNG.fix('.png_bg'); // argument is a CSS selector
 * DD_belatedPNG.fixPng( someNode ); // argument is an HTMLDomElement
 **/

if (navigator.userAgent.indexOf("MSIE 6") != -1) {
	var DD_belatedPNG = {
		ns: "DD_belatedPNG",
		imgSize: {},
		delay: 10,
		nodesFixed: 0,
		createVmlNameSpace: function () {
			if (document.namespaces && !document.namespaces[this.ns]) {
				document.namespaces.add(this.ns, "urn:schemas-microsoft-com:vml")
			}
		},
		createVmlStyleSheet: function () {
			var b, a;
			b = document.createElement("style");
			b.setAttribute("media", "screen");
			document.documentElement.firstChild.insertBefore(b, document.documentElement.firstChild.firstChild);
			if (b.styleSheet) {
				b = b.styleSheet;
				b.addRule(this.ns + "\\:*", "{behavior:url(#default#VML)}");
				b.addRule(this.ns + "\\:shape", "position:absolute;");
				b.addRule("img." + this.ns + "_sizeFinder", "behavior:none; border:none; position:absolute; z-index:-1; top:-10000px; visibility:hidden;");
				this.screenStyleSheet = b;
				a = document.createElement("style");
				a.setAttribute("media", "print");
				document.documentElement.firstChild.insertBefore(a, document.documentElement.firstChild.firstChild);
				a = a.styleSheet;
				a.addRule(this.ns + "\\:*", "{display: none !important;}");
				a.addRule("img." + this.ns + "_sizeFinder", "{display: none !important;}")
			}
		},
		readPropertyChange: function () {
			var b, c, a;
			b = event.srcElement;
			if (!b.vmlInitiated) {
				return
			}
			if (event.propertyName.search("background") != -1 || event.propertyName.search("border") != -1) {
				DD_belatedPNG.applyVML(b)
			}
			if (event.propertyName == "style.display") {
				c = (b.currentStyle.display == "none") ? "none" : "block";
				for (a in b.vml) {
					if (b.vml.hasOwnProperty(a)) {
						b.vml[a].shape.style.display = c
					}
				}
			}
			if (event.propertyName.search("filter") != -1) {
				DD_belatedPNG.vmlOpacity(b)
			}
		},
		vmlOpacity: function (b) {
			if (b.currentStyle.filter.search("lpha") != -1) {
				var a = b.currentStyle.filter;
				a = parseInt(a.substring(a.lastIndexOf("=") + 1, a.lastIndexOf(")")), 10) / 100;
				b.vml.color.shape.style.filter = b.currentStyle.filter;
				b.vml.image.fill.opacity = a
			}
		},
		handlePseudoHover: function (a) {
			setTimeout(function () {
				DD_belatedPNG.applyVML(a)
			}, 1)
		},
		fix: function (a) {
			if (this.screenStyleSheet) {
				var c, b;
				c = a.split(",");
				for (b = 0; b < c.length; b++) {
					this.screenStyleSheet.addRule(c[b], "behavior:expression(DD_belatedPNG.fixPng(this))")
				}
			}
		},
		applyVML: function (a) {
			a.runtimeStyle.cssText = "";
			this.vmlFill(a);
			this.vmlOffsets(a);
			this.vmlOpacity(a);
			if (a.isImg) {
				this.copyImageBorders(a)
			}
		},
		attachHandlers: function (i) {
			var d, c, g, e, b, f;
			d = this;
			c = {
				resize: "vmlOffsets",
				move: "vmlOffsets"
			};
			if (i.nodeName == "A") {
				e = {
					mouseleave: "handlePseudoHover",
					mouseenter: "handlePseudoHover",
					focus: "handlePseudoHover",
					blur: "handlePseudoHover"
				};
				for (b in e) {
					if (e.hasOwnProperty(b)) {
						c[b] = e[b]
					}
				}
			}
			for (f in c) {
				if (c.hasOwnProperty(f)) {
					g = function () {
						d[c[f]](i)
					};
					i.attachEvent("on" + f, g)
				}
			}
			i.attachEvent("onpropertychange", this.readPropertyChange)
		},
		giveLayout: function (a) {
			a.style.zoom = 1;
			if (a.currentStyle.position == "static") {
				a.style.position = "relative"
			}
		},
		copyImageBorders: function (b) {
			var c, a;
			c = {
				borderStyle: true,
				borderWidth: true,
				borderColor: true
			};
			for (a in c) {
				if (c.hasOwnProperty(a)) {
					b.vml.color.shape.style[a] = b.currentStyle[a]
				}
			}
		},
		vmlFill: function (e) {
			if (!e.currentStyle) {
				return
			} else {
				var d, f, g, b, a, c;
				d = e.currentStyle
			}
			for (b in e.vml) {
				if (e.vml.hasOwnProperty(b)) {
					e.vml[b].shape.style.zIndex = d.zIndex
				}
			}
			e.runtimeStyle.backgroundColor = "";
			e.runtimeStyle.backgroundImage = "";
			f = true;
			if (d.backgroundImage != "none" || e.isImg) {
				if (!e.isImg) {
					e.vmlBg = d.backgroundImage;
					e.vmlBg = e.vmlBg.substr(5, e.vmlBg.lastIndexOf('")') - 5)
				} else {
					e.vmlBg = e.src
				}
				g = this;
				if (!g.imgSize[e.vmlBg]) {
					a = document.createElement("img");
					g.imgSize[e.vmlBg] = a;
					a.className = g.ns + "_sizeFinder";
					a.runtimeStyle.cssText = "behavior:none; position:absolute; left:-10000px; top:-10000px; border:none; margin:0; padding:0;";
					c = function () {
						this.width = this.offsetWidth;
						this.height = this.offsetHeight;
						g.vmlOffsets(e)
					};
					a.attachEvent("onload", c);
					a.src = e.vmlBg;
					a.removeAttribute("width");
					a.removeAttribute("height");
					document.body.insertBefore(a, document.body.firstChild)
				}
				e.vml.image.fill.src = e.vmlBg;
				f = false
			}
			e.vml.image.fill.on = !f;
			e.vml.image.fill.color = "none";
			e.vml.color.shape.style.backgroundColor = d.backgroundColor;
			e.runtimeStyle.backgroundImage = "none";
			e.runtimeStyle.backgroundColor = "transparent"
		},
		vmlOffsets: function (d) {
			var h, n, a, e, g, m, f, l, j, i, k;
			h = d.currentStyle;
			n = {
				W: d.clientWidth + 1,
				H: d.clientHeight + 1,
				w: this.imgSize[d.vmlBg].width,
				h: this.imgSize[d.vmlBg].height,
				L: d.offsetLeft,
				T: d.offsetTop,
				bLW: d.clientLeft,
				bTW: d.clientTop
			};
			a = (n.L + n.bLW == 1) ? 1 : 0;
			e = function (b, p, q, c, s, u) {
				b.coordsize = c + "," + s;
				b.coordorigin = u + "," + u;
				b.path = "m0,0l" + c + ",0l" + c + "," + s + "l0," + s + " xe";
				b.style.width = c + "px";
				b.style.height = s + "px";
				b.style.left = p + "px";
				b.style.top = q + "px"
			};
			e(d.vml.color.shape, (n.L + (d.isImg ? 0 : n.bLW)), (n.T + (d.isImg ? 0 : n.bTW)), (n.W - 1), (n.H - 1), 0);
			e(d.vml.image.shape, (n.L + n.bLW), (n.T + n.bTW), (n.W), (n.H), 1);
			g = {
				X: 0,
				Y: 0
			};
			if (d.isImg) {
				g.X = parseInt(h.paddingLeft, 10) + 1;
				g.Y = parseInt(h.paddingTop, 10) + 1
			} else {
				for (j in g) {
					if (g.hasOwnProperty(j)) {
						this.figurePercentage(g, n, j, h["backgroundPosition" + j])
					}
				}
			}
			d.vml.image.fill.position = (g.X / n.W) + "," + (g.Y / n.H);
			m = h.backgroundRepeat;
			f = {
				T: 1,
				R: n.W + a,
				B: n.H,
				L: 1 + a
			};
			l = {
				X: {
					b1: "L",
					b2: "R",
					d: "W"
				},
				Y: {
					b1: "T",
					b2: "B",
					d: "H"
				}
			};
			if (m != "repeat" || d.isImg) {
				i = {
					T: (g.Y),
					R: (g.X + n.w),
					B: (g.Y + n.h),
					L: (g.X)
				};
				if (m.search("repeat-") != -1) {
					k = m.split("repeat-")[1].toUpperCase();
					i[l[k].b1] = 1;
					i[l[k].b2] = n[l[k].d]
				}
				if (i.B > n.H) {
					i.B = n.H
				}
				d.vml.image.shape.style.clip = "rect(" + i.T + "px " + (i.R + a) + "px " + i.B + "px " + (i.L + a) + "px)"
			} else {
				d.vml.image.shape.style.clip = "rect(" + f.T + "px " + f.R + "px " + f.B + "px " + f.L + "px)"
			}
		},
		figurePercentage: function (d, c, f, a) {
			var b, e;
			e = true;
			b = (f == "X");
			switch (a) {
			case "left":
			case "top":
				d[f] = 0;
				break;
			case "center":
				d[f] = 0.5;
				break;
			case "right":
			case "bottom":
				d[f] = 1;
				break;
			default:
				if (a.search("%") != -1) {
					d[f] = parseInt(a, 10) / 100
				} else {
					e = false
				}
			}
			d[f] = Math.ceil(e ? ((c[b ? "W" : "H"] * d[f]) - (c[b ? "w" : "h"] * d[f])) : parseInt(a, 10));
			if (d[f] % 2 === 0) {
				d[f]++
			}
			return d[f]
		},
		fixPng: function (c) {
			c.style.behavior = "none";
			var g, b, f, a, d;
			if (c.nodeName == "BODY" || c.nodeName == "TD" || c.nodeName == "TR") {
				return
			}
			c.isImg = false;
			if (c.nodeName == "IMG") {
				if (c.src.toLowerCase().search(/\.png$/) != -1) {
					c.isImg = true;
					c.style.visibility = "hidden"
				} else {
					return
				}
			} else {
				if (c.currentStyle.backgroundImage.toLowerCase().search(".png") == -1) {
					return
				}
			}
			g = DD_belatedPNG;
			c.vml = {
				color: {},
				image: {}
			};
			b = {
				shape: {},
				fill: {}
			};
			for (a in c.vml) {
				if (c.vml.hasOwnProperty(a)) {
					for (d in b) {
						if (b.hasOwnProperty(d)) {
							f = g.ns + ":" + d;
							c.vml[a][d] = document.createElement(f)
						}
					}
					c.vml[a].shape.stroked = false;
					c.vml[a].shape.appendChild(c.vml[a].fill);
					c.parentNode.insertBefore(c.vml[a].shape, c)
				}
			}
			c.vml.image.shape.fillcolor = "none";
			c.vml.image.fill.type = "tile";
			c.vml.color.fill.on = false;
			g.attachHandlers(c);
			g.giveLayout(c);
			g.giveLayout(c.offsetParent);
			c.vmlInitiated = true;
			g.applyVML(c)
		}
	};
	try {
		document.execCommand("BackgroundImageCache", false, true)
	} catch (r) {}
	DD_belatedPNG.createVmlNameSpace();
	DD_belatedPNG.createVmlStyleSheet();


	var oldFixPng = DD_belatedPNG.fixPng;
	DD_belatedPNG.fixPng = function (el) {
		oldFixPng(el);
		if (el.vml && el.vml.image.fill.getAttribute("src").match(/_off\./)) {
			var image = el.vml.image.fill;
			el.vml.image.shape.attachEvent('onmouseover', function () {
				image.setAttribute("src", image.getAttribute("src").replace("_off.", "_on."));
			});
			el.vml.image.shape.attachEvent('onmouseout', function () {
				image.setAttribute("src", image.getAttribute("src").replace("_on.", "_off."));
			});
		}

//		var gNavObj = '#' + $('body').attr('id') + 'Nav';
//		if ($('#globalNavi li').filter(gNavObj).size() == 1) {
//			$gNavObj = $(gNavObj).find('a:first img');
//			var imgsrc = $gNavObj.attr('src');
//			var imgsrc_on = imgsrc.replace('_of.', '_on.');
//			$gNavObj.attr('src', imgsrc_on);
//		}
	};
	DD_belatedPNG.fix('img, .png_bg');
}