ie 6 png问题解决

<!--[if IE 6]> <script src="js/DD_belatedPNG_0.0.8a.js"></script> <script>   DD_belatedPNG.fix('.ab,.ab1,.ab2,.ab3,.ab4,.ab5,.ab6,.ab7'); </script> <![endif]-->

 

专门解决ie6 png格式的问题，用法：粘贴上述代码，链接到DD_belatedPNG_0.0.8a.js， DD_belatedPNG.fix('.ab,.ab1,.ab2,.ab3,.ab4,.ab5,.ab6,.ab7');

.ab,.ab1,.ab2,.ab3,.ab4,.ab5,.ab6,.ab7是页面用到png的class名称

 

DD_belatedPNG_0.0.8a.js

当前路径：web/js/DD_belatedPNG_0.0.8a.js
2	/**
3	* DD_belatedPNG: Adds IE6 support: PNG images for CSS background-image and HTML <IMG/>.
4	* Author: Drew Diller
5	* Email: drew.diller@gmail.com
6	* URL: http://www.dillerdesign.com/experiment/DD_belatedPNG/
7	* Version: 0.0.8a
8	* Licensed under the MIT License: http://dillerdesign.com/experiment/DD_belatedPNG/#license
9	*
10	* Example usage:
11	* DD_belatedPNG.fix('.png_bg'); // argument is a CSS selector
12	* DD_belatedPNG.fixPng( someNode ); // argument is an HTMLDomElement
13	**/
14
15	/*
16	PLEASE READ:
17	Absolutely everything in this script is SILLY.  I know this.  IE's rendering of certain pixels doesn't make sense, so neither does this code!
18	*/
19
20	var DD_belatedPNG = {
21	ns: 'DD_belatedPNG',
22	imgSize: {},
23	delay: 10,
24	nodesFixed: 0,
25	createVmlNameSpace: function () { /* enable VML */
26	if (document.namespaces && !document.namespaces[this.ns]) {
27	document.namespaces.add(this.ns, 'urn:schemas-microsoft-com:vml');
28	}
29	},
30	createVmlStyleSheet: function () { /* style VML, enable behaviors */
31	/*
32	Just in case lots of other developers have added
33	lots of other stylesheets using document.createStyleSheet
34	and hit the 31-limit mark, let's not use that method!
35	further reading: http://msdn.microsoft.com/en-us/library/ms531194(VS.85).aspx
36	*/
37	var screenStyleSheet, printStyleSheet;
38	screenStyleSheet = document.createElement('style');
39	screenStyleSheet.setAttribute('media', 'screen');
40	document.documentElement.firstChild.insertBefore(screenStyleSheet, document.documentElement.firstChild.firstChild);
41	if (screenStyleSheet.styleSheet) {
42	screenStyleSheet = screenStyleSheet.styleSheet;
43	screenStyleSheet.addRule(this.ns + '\\:*', '{behavior:url(#default#VML)}');
44	screenStyleSheet.addRule(this.ns + '\\:shape', 'position:absolute;');
45	screenStyleSheet.addRule('img.' + this.ns + '_sizeFinder', 'behavior:none; border:none; position:absolute; z-index:-1; top:-10000px; visibility:hidden;'); /* large negative top value for avoiding vertical scrollbars for large images, suggested by James O'Brien, http://www.thanatopsic.org/hendrik/ */
46	this.screenStyleSheet = screenStyleSheet;
47
48	/* Add a print-media stylesheet, for preventing VML artifacts from showing up in print (including preview). */
49	/* Thanks to R閙i Pr関ost for automating this! */
50	printStyleSheet = document.createElement('style');
51	printStyleSheet.setAttribute('media', 'print');
52	document.documentElement.firstChild.insertBefore(printStyleSheet, document.documentElement.firstChild.firstChild);
53	printStyleSheet = printStyleSheet.styleSheet;
54	printStyleSheet.addRule(this.ns + '\\:*', '{display: none !important;}');
55	printStyleSheet.addRule('img.' + this.ns + '_sizeFinder', '{display: none !important;}');
56	}
57	},
58	readPropertyChange: function () {
59	var el, display, v;
60	el = event.srcElement;
61	if (!el.vmlInitiated) {
62	return;
63	}
64	if (event.propertyName.search('background') != -1 || event.propertyName.search('border') != -1) {
65	DD_belatedPNG.applyVML(el);
66	}
67	if (event.propertyName == 'style.display') {
68	display = (el.currentStyle.display == 'none') ? 'none' : 'block';
69	for (v in el.vml) {
70	if (el.vml.hasOwnProperty(v)) {
71	el.vml[v].shape.style.display = display;
72	}
73	}
74	}
75	if (event.propertyName.search('filter') != -1) {
76	DD_belatedPNG.vmlOpacity(el);
77	}
78	},
79	vmlOpacity: function (el) {
80	if (el.currentStyle.filter.search('lpha') != -1) {
81	var trans = el.currentStyle.filter;
82	trans = parseInt(trans.substring(trans.lastIndexOf('=')+1, trans.lastIndexOf(')')), 10)/100;
83	el.vml.color.shape.style.filter = el.currentStyle.filter; /* complete guesswork */
84	el.vml.image.fill.opacity = trans; /* complete guesswork */
85	}
86	},
87	handlePseudoHover: function (el) {
88	setTimeout(function () { /* wouldn't work as intended without setTimeout */
89	DD_belatedPNG.applyVML(el);
90	}, 1);
91	},
92	/**
93	* This is the method to use in a document.
94	* @param {String} selector - REQUIRED - a CSS selector, such as '#doc .container'
95	**/
96	fix: function (selector) {
97	if (this.screenStyleSheet) {
98	var selectors, i;
99	selectors = selector.split(','); /* multiple selectors supported, no need for multiple calls to this anymore */
100	for (i=0; i<selectors.length; i++) {
101	this.screenStyleSheet.addRule(selectors[i], 'behavior:expression(DD_belatedPNG.fixPng(this))'); /* seems to execute the function without adding it to the stylesheet - interesting... */
102	}
103	}
104	},
105	applyVML: function (el) {
106	el.runtimeStyle.cssText = '';
107	this.vmlFill(el);
108	this.vmlOffsets(el);
109	this.vmlOpacity(el);
110	if (el.isImg) {
111	this.copyImageBorders(el);
112	}
113	},
114	attachHandlers: function (el) {
115	var self, handlers, handler, moreForAs, a, h;
116	self = this;
117	handlers = {resize: 'vmlOffsets', move: 'vmlOffsets'};
118	if (el.nodeName == 'A') {
119	moreForAs = {mouseleave: 'handlePseudoHover', mouseenter: 'handlePseudoHover', focus: 'handlePseudoHover', blur: 'handlePseudoHover'};
120	for (a in moreForAs) {
121	if (moreForAs.hasOwnProperty(a)) {
122	handlers[a] = moreForAs[a];
123	}
124	}
125	}
126	for (h in handlers) {
127	if (handlers.hasOwnProperty(h)) {
128	handler = function () {
129	self[handlers[h]](el);
130	};
131	el.attachEvent('on' + h, handler);
132	}
133	}
134	el.attachEvent('onpropertychange', this.readPropertyChange);
135	},
136	giveLayout: function (el) {
137	el.style.zoom = 1;
138	if (el.currentStyle.position == 'static') {
139	el.style.position = 'relative';
140	}
141	},
142	copyImageBorders: function (el) {
143	var styles, s;
144	styles = {'borderStyle':true, 'borderWidth':true, 'borderColor':true};
145	for (s in styles) {
146	if (styles.hasOwnProperty(s)) {
147	el.vml.color.shape.style[s] = el.currentStyle[s];
148	}
149	}
150	},
151	vmlFill: function (el) {
152	if (!el.currentStyle) {
153	return;
154	} else {
155	var elStyle, noImg, lib, v, img, imgLoaded;
156	elStyle = el.currentStyle;
157	}
158	for (v in el.vml) {
159	if (el.vml.hasOwnProperty(v)) {
160	el.vml[v].shape.style.zIndex = elStyle.zIndex;
161	}
162	}
163	el.runtimeStyle.backgroundColor = '';
164	el.runtimeStyle.backgroundImage = '';
165	noImg = true;
166	if (elStyle.backgroundImage != 'none' || el.isImg) {
167	if (!el.isImg) {
168	el.vmlBg = elStyle.backgroundImage;
169	el.vmlBg = el.vmlBg.substr(5, el.vmlBg.lastIndexOf('")')-5);
170	}
171	else {
172	el.vmlBg = el.src;
173	}
174	lib = this;
175	if (!lib.imgSize[el.vmlBg]) { /* determine size of loaded image */
176	img = document.createElement('img');
177	lib.imgSize[el.vmlBg] = img;
178	img.className = lib.ns + '_sizeFinder';
179	img.runtimeStyle.cssText = 'behavior:none; position:absolute; left:-10000px; top:-10000px; border:none; margin:0; padding:0;'; /* make sure to set behavior to none to prevent accidental matching of the helper elements! */
180	imgLoaded = function () {
181	this.width = this.offsetWidth; /* weird cache-busting requirement! */
182	this.height = this.offsetHeight;
183	lib.vmlOffsets(el);
184	};
185	img.attachEvent('onload', imgLoaded);
186	img.src = el.vmlBg;
187	img.removeAttribute('width');
188	img.removeAttribute('height');
189	document.body.insertBefore(img, document.body.firstChild);
190	}
191	el.vml.image.fill.src = el.vmlBg;
192	noImg = false;
193	}
194	el.vml.image.fill.on = !noImg;
195	el.vml.image.fill.color = 'none';
196	el.vml.color.shape.style.backgroundColor = elStyle.backgroundColor;
197	el.runtimeStyle.backgroundImage = 'none';
198	el.runtimeStyle.backgroundColor = 'transparent';
199	},
200	/* IE can't figure out what do when the offsetLeft and the clientLeft add up to 1, and the VML ends up getting fuzzy... so we have to push/enlarge things by 1 pixel and then clip off the excess */
201	vmlOffsets: function (el) {
202	var thisStyle, size, fudge, makeVisible, bg, bgR, dC, altC, b, c, v;
203	thisStyle = el.currentStyle;
204	size = {'W':el.clientWidth+1, 'H':el.clientHeight+1, 'w':this.imgSize[el.vmlBg].width, 'h':this.imgSize[el.vmlBg].height, 'L':el.offsetLeft, 'T':el.offsetTop, 'bLW':el.clientLeft, 'bTW':el.clientTop};
205	fudge = (size.L + size.bLW == 1) ? 1 : 0;
206	/* vml shape, left, top, width, height, origin */
207	makeVisible = function (vml, l, t, w, h, o) {
208	vml.coordsize = w+','+h;
209	vml.coordorigin = o+','+o;
210	vml.path = 'm0,0l'+w+',0l'+w+','+h+'l0,'+h+' xe';
211	vml.style.width = w + 'px';
212	vml.style.height = h + 'px';
213	vml.style.left = l + 'px';
214	vml.style.top = t + 'px';
215	};
216	makeVisible(el.vml.color.shape, (size.L + (el.isImg ? 0 : size.bLW)), (size.T + (el.isImg ? 0 : size.bTW)), (size.W-1), (size.H-1), 0);
217	makeVisible(el.vml.image.shape, (size.L + size.bLW), (size.T + size.bTW), (size.W), (size.H), 1 );
218	bg = {'X':0, 'Y':0};
219	if (el.isImg) {
220	bg.X = parseInt(thisStyle.paddingLeft, 10) + 1;
221	bg.Y = parseInt(thisStyle.paddingTop, 10) + 1;
222	}
223	else {
224	for (b in bg) {
225	if (bg.hasOwnProperty(b)) {
226	this.figurePercentage(bg, size, b, thisStyle['backgroundPosition'+b]);
227	}
228	}
229	}
230	el.vml.image.fill.position = (bg.X/size.W) + ',' + (bg.Y/size.H);
231	bgR = thisStyle.backgroundRepeat;
232	dC = {'T':1, 'R':size.W+fudge, 'B':size.H, 'L':1+fudge}; /* these are defaults for repeat of any kind */
233	altC = { 'X': {'b1': 'L', 'b2': 'R', 'd': 'W'}, 'Y': {'b1': 'T', 'b2': 'B', 'd': 'H'} };
234	if (bgR != 'repeat' || el.isImg) {
235	c = {'T':(bg.Y), 'R':(bg.X+size.w), 'B':(bg.Y+size.h), 'L':(bg.X)}; /* these are defaults for no-repeat - clips down to the image location */
236	if (bgR.search('repeat-') != -1) { /* now let's revert to dC for repeat-x or repeat-y */
237	v = bgR.split('repeat-')[1].toUpperCase();
238	c[altC[v].b1] = 1;
239	c[altC[v].b2] = size[altC[v].d];
240	}
241	if (c.B > size.H) {
242	c.B = size.H;
243	}
244	el.vml.image.shape.style.clip = 'rect('+c.T+'px '+(c.R+fudge)+'px '+c.B+'px '+(c.L+fudge)+'px)';
245	}
246	else {
247	el.vml.image.shape.style.clip = 'rect('+dC.T+'px '+dC.R+'px '+dC.B+'px '+dC.L+'px)';
248	}
249	},
250	figurePercentage: function (bg, size, axis, position) {
251	var horizontal, fraction;
252	fraction = true;
253	horizontal = (axis == 'X');
254	switch(position) {
255	case 'left':
256	case 'top':
257	bg[axis] = 0;
258	break;
259	case 'center':
260	bg[axis] = 0.5;
261	break;
262	case 'right':
263	case 'bottom':
264	bg[axis] = 1;
265	break;
266	default:
267	if (position.search('%') != -1) {
268	bg[axis] = parseInt(position, 10) / 100;
269	}
270	else {
271	fraction = false;
272	}
273	}
274	bg[axis] = Math.ceil(  fraction ? ( (size[horizontal?'W': 'H'] * bg[axis]) - (size[horizontal?'w': 'h'] * bg[axis]) ) : parseInt(position, 10)  );
275	if (bg[axis] % 2 === 0) {
276	bg[axis]++;
277	}
278	return bg[axis];
279	},
280	fixPng: function (el) {
281	el.style.behavior = 'none';
282	var lib, els, nodeStr, v, e;
283	if (el.nodeName == 'BODY' || el.nodeName == 'TD' || el.nodeName == 'TR') { /* elements not supported yet */
284	return;
285	}
286	el.isImg = false;
287	if (el.nodeName == 'IMG') {
288	if(el.src.toLowerCase().search(/\.png$/) != -1) {
289	el.isImg = true;
290	el.style.visibility = 'hidden';
291	}
292	else {
293	return;
294	}
295	}
296	else if (el.currentStyle.backgroundImage.toLowerCase().search('.png') == -1) {
297	return;
298	}
299	lib = DD_belatedPNG;
300	el.vml = {color: {}, image: {}};
301	els = {shape: {}, fill: {}};
302	for (v in el.vml) {
303	if (el.vml.hasOwnProperty(v)) {
304	for (e in els) {
305	if (els.hasOwnProperty(e)) {
306	nodeStr = lib.ns + ':' + e;
307	el.vml[v][e] = document.createElement(nodeStr);
308	}
309	}
310	el.vml[v].shape.stroked = false;
311	el.vml[v].shape.appendChild(el.vml[v].fill);
312	el.parentNode.insertBefore(el.vml[v].shape, el);
313	}
314	}
315	el.vml.image.shape.fillcolor = 'none'; /* Don't show blank white shapeangle when waiting for image to load. */
316	el.vml.image.fill.type = 'tile'; /* Makes image show up. */
317	el.vml.color.fill.on = false; /* Actually going to apply vml element's style.backgroundColor, so hide the whiteness. */
318	lib.attachHandlers(el);
319	lib.giveLayout(el);
320	lib.giveLayout(el.offsetParent);
321	el.vmlInitiated = true;
322	lib.applyVML(el); /* Render! */
323	}
324	};
325	try {
326	document.execCommand("BackgroundImageCache", false, true); /* TredoSoft Multiple IE doesn't like this, so try{} it */
327	} catch(r) {}
328	DD_belatedPNG.createVmlNameSpace();
329	DD_belatedPNG.createVmlStyleSheet();