(function (b) { if (!document.defaultView || !document.defaultView.getComputedStyle) { var d = b.curCSS; b.curCSS = function (g, e, h) { if (e === "background-position") { e = "backgroundPosition" } if (e !== "backgroundPosition" || !g.currentStyle || g.currentStyle[e]) { return d.apply(this, arguments) } var f = g.style; if (!h && f && f[e]) { return f[e] } return d(g, "backgroundPositionX", h) + " " + d(g, "backgroundPositionY", h) } } var c = b.fn.animate; b.fn.animate = function (e) { if ("background-position" in e) { e.backgroundPosition = e["background-position"]; delete e["background-position"] } if ("backgroundPosition" in e) { e.backgroundPosition = "(" + e.backgroundPosition } return c.apply(this, arguments) }; function a(f) { f = f.replace(/left|top/g, "0px"); f = f.replace(/right|bottom/g, "100%"); f = f.replace(/([0-9\.]+)(\s|\)|$)/g, "$1px$2"); var e = f.match(/(-?[0-9\.]+)(px|\%|em|pt)\s(-?[0-9\.]+)(px|\%|em|pt)/); return [parseFloat(e[1], 10), e[2], parseFloat(e[3], 10), e[4]] } b.fx.step.backgroundPosition = function (f) { if (!f.bgPosReady) { var h = b.curCSS(f.elem, "backgroundPosition"); if (!h) { h = "0px 0px" } h = a(h); f.start = [h[0], h[2]]; var e = a(f.end); f.end = [e[0], e[2]]; f.unit = [e[1], e[3]]; f.bgPosReady = true } var g = []; g[0] = ((f.end[0] - f.start[0]) * f.pos) + f.start[0] + f.unit[0]; g[1] = ((f.end[1] - f.start[1]) * f.pos) + f.start[1] + f.unit[1]; f.elem.style.backgroundPosition = g[0] + " " + g[1] } })(jQuery);