Im trying to get two alpha-24 transparent .png files to crossfade into each other. I started this adventure by modifying a pretty decent little script (thanks to jqueryfordesigners.com):
// wrap as a jQuery plugin and pass jQuery in to our anoymous function
(function ($) {
$.fn.cross = function (options) {
return this.each(function (i) {
// cache the copy of jQuery(this) - the start image
var $$ = $(this);
// get the target from the backgroundImage + regexp
var target = $$.css('backgroundImage').replace(/^url|[\(\)'"]/g, '');
// nice long chain: wrap img element in span
$$.wrap('<span style="position: relative;"></span>')
// change selector to parent - i.e. newly created span
.parent()
// prepend a new image inside the span
.prepend('<img>')
// change the selector to the newly created image
.find(':first-child')
// set the image to the target
.attr('src', target);
// the CSS styling of the start image needs to be handled
// differently for different browsers
if ($.browser.mozilla) {
$$.css({
'position' : 'absolute',
'left' : 0,
'background' : '',
'top' : this.offsetTop
});
} else if ($.browser.msie && $.browser.version == 8.0) {
$$.css({
'position' : 'absolute',
'left' : 0,
'background' : '',
'-ms-background-position-x' : '0px',
'-ms-background-position-y' : '0px'
});
} else if ($.browser.msie) {
$$.css({
'position' : 'absolute',
'left' : 0,
'background' : '',
'top' : 0
});
} else if ($.browser.opera && $.browser.version < 9.5) {
// Browser sniffing is bad - however opera < 9.5 has a render bug
// so this is required to get around it we can't apply the 'top' : 0
// separately because Mozilla strips the style set originally somehow...
$$.css({
'position' : 'absolute',
'left' : 0,
'background' : '',
'top' : "0"
});
} else { // Safari & Chrome
$$.css({
'position' : 'absolute',
'left' : 0,
'background' : ''
});
}
// similar effect as single image technique, except using .animate
// which will handle the fading up from the right opacity for us
$$.hover(function () {
$$.stop().animate({
opacity: 0
}, 250);
}, function () {
$$.stop().animate({
opacity: 1
}, 250);
});
});
};
})(jQuery);
// note that this uses the .bind('load') on the window object, rather than $(document).ready()
// because .ready() fires before the images have loaded, but we need to fire *after* because
// our code relies on the dimensions of the images already in place.
$(window).bind('load', function () {
$('img.fade').cross();
});
The main modifications I made were to make it work in IE7/8 and webkit by fixing some absolute positioning bugs. Only problem now is that I run into an issue covered here - [stackoverflow.com/questions/1156985, IE7 and IE8] can only handle transparency on one image at a time. The crossfade gives me the result of a grayed out image during and after the effect. Check it out in action: http://dap-llc.com/work/
Anyone have a good way to get around this? And no points for suggesting that I fade a container element - there has to be a way to do this on the image level in IE.