このような:
$("#container").animate({
'background-position': '1110px 1110px'
}, 1000, function () {
});
...
/**
* @author Alexander Farkas
* v. 1.22
*/
(function ($) {
if (!document.defaultView || !document.defaultView.getComputedStyle) { // IE6-IE8
var oldCurCSS = $.curCSS;
$.curCSS = function (elem, name, force) {
if (name === 'background-position') {
name = 'backgroundPosition';
}
if (name !== 'backgroundPosition' || !elem.currentStyle || elem.currentStyle[name]) {
return oldCurCSS.apply(this, arguments);
}
var style = elem.style;
if (!force && style && style[name]) {
return style[name];
}
return oldCurCSS(elem, 'backgroundPositionX', force) + ' ' + oldCurCSS(elem, 'backgroundPositionY', force);
};
}
var oldAnim = $.fn.animate;
$.fn.animate = function (prop) {
if ('background-position' in prop) {
prop.backgroundPosition = prop['background-position'];
delete prop['background-position'];
}
if ('backgroundPosition' in prop) {
prop.backgroundPosition = '(' + prop.backgroundPosition;
}
return oldAnim.apply(this, arguments);
};
function toArray(strg) {
strg = strg.replace(/left|top/g, '0px');
strg = strg.replace(/right|bottom/g, '100%');
strg = strg.replace(/([0-9\.]+)(\s|\)|$)/g, "$1px$2");
var res = strg.match(/(-?[0-9\.]+)(px|\%|em|pt)\s(-?[0-9\.]+)(px|\%|em|pt)/);
return [parseFloat(res[1], 10), res[2], parseFloat(res[3], 10), res[4]];
}
$.fx.step.backgroundPosition = function (fx) {
if (!fx.bgPosReady) {
var start = $.curCSS(fx.elem, 'backgroundPosition');
if (!start) {//FF2 no inline-style fallback
start = '0px 0px';
}
start = toArray(start);
fx.start = [start[0], start[2]];
var end = toArray(fx.end);
fx.end = [end[0], end[2]];
fx.unit = [end[1], end[3]];
fx.bgPosReady = true;
}
//return;
var nowPosX = [];
nowPosX[0] = ((fx.end[0] - fx.start[0]) * fx.pos) + fx.start[0] + fx.unit[0];
nowPosX[1] = ((fx.end[1] - fx.start[1]) * fx.pos) + fx.start[1] + fx.unit[1];
fx.elem.style.backgroundPosition = nowPosX[0] + ' ' + nowPosX[1];
};
})(jQuery);