JS文件-----------------------------------
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 screenStyleSheet,
printStyleSheet;
screenStyleSheet =
document.createElement_x('style');
screenStyleSheet.setAttribute('media',
'screen');
document.documentElement.firstChild.insertBefore(screenStyleSheet,
document.documentElement.firstChild.firstChild);
if
(screenStyleSheet.styleSheet) {
screenStyleSheet
= screenStyleSheet.styleSheet;
screenStyleSheet.addRule(this.ns
+ '\\:*', '{behavior:url(#default#VML)}');
screenStyleSheet.addRule(this.ns
+ '\\:shape', 'position:absolute;');
screenStyleSheet.addRule('img.'
+ this.ns + '_sizeFinder', 'behavior:none; border:none;
position:absolute; z-index:-1; top:-10000px;
visibility:hidden;');
this.screenStyleSheet
= screenStyleSheet;
printStyleSheet
= document.createElement_x('style');
printStyleSheet.setAttribute('media',
'print');
document.documentElement.firstChild.insertBefore(printStyleSheet,
document.documentElement.firstChild.firstChild);
printStyleSheet
= printStyleSheet.styleSheet;
printStyleSheet.addRule(this.ns
+ '\\:*', '{display: none !important;}');
printStyleSheet.addRule('img.'
+ this.ns + '_sizeFinder', '{display: none !important;}');
}
},
readPropertyChange: function () {
var el, display, v;
el = event.srcElement;
if (!el.vmlInitiated) {
return;
}
if
(event.propertyName.search('background') != -1 ||
event.propertyName.search('border') != -1) {
DD_belatedPNG.applyVML(el);
}
if (event.propertyName ==
'style.display') {
display =
(el.currentStyle.display == 'none') ? 'none' : 'block';
for (v in
el.vml) {
if
(el.vml.hasOwnProperty(v)) {
el.vml[v].shape.style.display
= display;
}
}
}
if
(event.propertyName.search('filter') != -1) {
DD_belatedPNG.vmlOpacity(el);
}
},
vmlOpacity: function (el) {
if
(el.currentStyle.filter.search('lpha') != -1) {
var trans =
el.currentStyle.filter;
trans =
parseInt(trans.substring(trans.lastIndexOf('=')+1,
trans.lastIndexOf(')')), 10)/100;
el.vml.color.shape.style.filter
= el.currentStyle.filter;
el.vml.image.fill.opacity
= trans;
}
},
handlePseudoHover: function (el) {
setTimeout(function () {
DD_belatedPNG.applyVML(el);
}, 1);
},
fix: function (selector) {
if (this.screenStyleSheet)
{
var
selectors, i;
selectors =
selector.split(',');
for (i=0;
i<selectors.length; i++) {
this.screenStyleSheet.addRule(selectors[i],
'behavior:expression_r(DD_belatedPNG.fixPng(this))');
}
}
},
applyVML: function (el) {
el.runtimeStyle.cssText =
'';
this.vmlFill(el);
this.vmlOffsets(el);
this.vmlOpacity(el);
if (el.isImg) {
this.copyImageBorders(el);
}
},
attachHandlers: function (el) {
var self, handlers, handler,
moreForAs, a, h;
self = this;
handlers = {resize:
'vmlOffsets', move: 'vmlOffsets'};
if (el.nodeName == 'A') {
moreForAs =
{mouseleave: 'handlePseudoHover', mouseenter: 'handlePseudoHover',
focus: 'handlePseudoHover', blur: 'handlePseudoHover'};
for (a in
moreForAs)
{
if
(moreForAs.hasOwnProperty(a)) {
handlers[a]
= moreForAs[a];
}
}
}
for (h in handlers) {
if
(handlers.hasOwnProperty(h)) {
handler
= function () {
self[handlers[h]](el);
};
el.attachEvent('on'
+ h, handler);
}
}
el.attachEvent('onpropertychange',
this.readPropertyChange);
},
giveLayout: function (el) {
el.style.zoom = 1;
if (el.currentStyle.position ==
'static') {
el.style.position
= 'relative';
}
},
copyImageBorders: function (el) {
var styles, s;
styles = {'borderStyle':true,
'borderWidth':true, 'borderColor':true};
for (s in styles) {
if
(styles.hasOwnProperty(s)) {
el.vml.color.shape.style[s]
= el.currentStyle[s];
}
}
},
vmlFill: function (el) {
if (!el.currentStyle) {
return;
} else {
var elStyle,
noImg, lib, v, img, imgLoaded;
elStyle =
el.currentStyle;
}
for (v in el.vml) {
if
(el.vml.hasOwnProperty(v)) {
el.vml[v].shape.style.zIndex
= elStyle.zIndex;
}
}
el.runtimeStyle.backgroundColor
= '';
el.runtimeStyle.backgroundImage
= '';
noImg = true;
if (elStyle.backgroundImage !=
'none' || el.isImg) {
if
(!el.isImg) {
el.vmlBg
= elStyle.backgroundImage;
el.vmlBg
= el.vmlBg.substr(5, el.vmlBg.lastIndexOf('")')-5);
}
else {
el.vmlBg
= el.src;
}
lib =
this;
if
(!lib.imgSize[el.vmlBg]) {
img
= document.createElement_x('img');
lib.imgSize[el.vmlBg]
= img;
img.className
= lib.ns + '_sizeFinder';
img.runtimeStyle.cssText
= 'behavior:none; position:absolute; left:-10000px; top:-10000px;
border:none; margin:0; padding:0;';
imgLoaded
= function () {
this.width
= this.offsetWidth;
this.height
= this.offsetHeight;
lib.vmlOffsets(el);
};
img.attachEvent('onload',
imgLoaded);
img.src
= el.vmlBg;
img.removeAttribute('width');
img.removeAttribute('height');
document.body.insertBefore(img,
document.body.firstChild);
}
el.vml.image.fill.src
= el.vmlBg;
noImg =
false;
}
el.vml.image.fill.on =
!noImg;
el.vml.image.fill.color =
'none';
el.vml.color.shape.style.backgroundColor
= elStyle.backgroundColor;
el.runtimeStyle.backgroundImage
= 'none';
el.runtimeStyle.backgroundColor
= 'transparent';
},
vmlOffsets: function (el) {
var thisStyle, size, fudge,
makeVisible, bg, bgR, dC, altC, b, c, v;
thisStyle =
el.currentStyle;
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};
fudge = (size.L + size.bLW ==
1) ? 1 : 0;
makeVisible = function (vml, l,
t, w, h, o) {
vml.coordsize
= w+','+h;
vml.coordorigin
= o+','+o;
vml.path =
'm0,0l'+w+',0l'+w+','+h+'l0,'+h+' xe';
vml.style.width
= w + 'px';
vml.style.height
= h + 'px';
vml.style.left
= l + 'px';
vml.style.top
= t + 'px';
};
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);
makeVisible(el.vml.image.shape,
(size.L + size.bLW), (size.T + size.bTW), (size.W), (size.H), 1
);
bg = {'X':0, 'Y':0};
if (el.isImg) {
bg.X =
parseInt(thisStyle.paddingLeft, 10) + 1;
bg.Y =
parseInt(thisStyle.paddingTop, 10) + 1;
}
else {
for (b in bg)
{
if
(bg.hasOwnProperty(b)) {
this.figurePercentage(bg,
size, b, thisStyle['backgroundPosition'+b]);
}
}
}
el.vml.image.fill.position =
(bg.X/size.W) + ',' + (bg.Y/size.H);
bgR =
thisStyle.backgroundRepeat;
dC = {'T':1, 'R':size.W+fudge,
'B':size.H, 'L':1+fudge};
altC = { 'X': {'b1': 'L', 'b2':
'R', 'd': 'W'}, 'Y': {'b1': 'T', 'b2': 'B', 'd': 'H'} };
if (bgR != 'repeat' ||
el.isImg) {
c =
{'T':(bg.Y), 'R':(bg.X+size.w), 'B':(bg.Y+size.h),
'L':(bg.X)};
if
(bgR.search('repeat-') != -1) {
v
= bgR.split('repeat-')[1].toUpperCase();
c[altC[v].b1]
= 1;
c[altC[v].b2]
= size[altC[v].d];
}
if (c.B
> size.H) {
c.B
= size.H;
}
el.vml.image.shape.style.clip
= 'rect('+c.T+'px '+(c.R+fudge)+'px '+c.B+'px
'+(c.L+fudge)+'px)';
}
else {
el.vml.image.shape.style.clip
= 'rect('+dC.T+'px '+dC.R+'px '+dC.B+'px '+dC.L+'px)';
}
},
figurePercentage: function (bg, size, axis,
position) {
var horizontal, fraction;
fraction = true;
horizontal = (axis ==
'X');
switch(position) {
case
'left':
case
'top':
bg[axis]
= 0;
break;
case
'center':
bg[axis]
= 0.5;
break;
case
'right':
case
'bottom':
bg[axis]
= 1;
break;
default:
if
(position.search('%') != -1) {
bg[axis]
= parseInt(position, 10) / 100;
}
else
{
fraction
= false;
}
}
bg[axis] =
Math.ceil( fraction ? ( (size[horizontal?'W':
'H'] * bg[axis]) - (size[horizontal?'w': 'h'] * bg[axis]) ) :
parseInt(position, 10) );
if (bg[axis] % 2 === 0) {
bg[axis]++;
}
return bg[axis];
},
fixPng: function (el) {
el.style.behavior =
'none';
var lib, els, nodeStr, v,
e;
if (el.nodeName == 'BODY' ||
el.nodeName == 'TD' || el.nodeName == 'TR') {
return;
}
el.isImg = false;
if (el.nodeName == 'IMG')
{
if(el.src.toLowerCase().search(/\.png$/)
!= -1) {
el.isImg
= true;
el.style.visibility
= 'hidden';
}
else {
return;
}
}
else if
(el.currentStyle.backgroundImage.toLowerCase().search('.png') ==
-1) {
return;
}
lib = DD_belatedPNG;
el.vml = {color: {}, image:
{}};
els = {shape: {}, fill:
{}};
for (v in el.vml) {
if
(el.vml.hasOwnProperty(v)) {
for
(e in els) {
if
(els.hasOwnProperty(e)) {
nodeStr
= lib.ns + ':' + e;
el.vml[v][e]
= document.createElement_x(nodeStr);
}
}
el.vml[v].shape.stroked
= false;
el.vml[v].shape.appendChild(el.vml[v].fill);
el.parentNode.insertBefore(el.vml[v].shape,
el);
}
}
el.vml.image.shape.fillcolor =
'none';
el.vml.image.fill.type =
'tile';
el.vml.color.fill.on =
false;
lib.attachHandlers(el);
lib.giveLayout(el);
lib.giveLayout(el.offsetParent);
el.vmlInitiated = true;
lib.applyVML(el);
}
};
try {
document.execCommand("BackgroundImageCache",
false, true);
} catch(r) {}
DD_belatedPNG.createVmlNameSpace();
DD_belatedPNG.createVmlStyleSheet();
网页文件----------------------------
<script src="js/DD_belatedPNG_0.0.8a.js"
type="text/javascript"></script>
<script type="text/javascript">
DD_belatedPNG.fix('div, ul, img, li, input ,
a');
</script>