! function(a) { a(document).ready(function() { function q() { if(document.URL.indexOf("google.com/reader/view") > -1 && (g = !0), i) for(var a = i.split(/[, ] ?/), b = a.length; b--;) if(document.URL.indexOf(a[b]) > -1) { D("mousewheel", v), g = !0; break } } function r() { if(document.body) { var a = document.body, b = document.documentElement, c = window.innerHeight, d = a.scrollHeight; if(o = document.compatMode.indexOf("CSS") >= 0 ? b : a, n = a, q(), l = !0, top != self) j = !0; else if(d > c && (a.offsetHeight <= c || b.offsetHeight <= c) && (o.style.height = "auto", o.offsetHeight <= c)) { var e = document.createElement("div"); e.style.clear = "both", a.appendChild(e) } if(document.URL.indexOf("mail.google.com") > -1) { var f = document.createElement("style"); f.innerHTML = ".iu { visibility: hidden }", (document.getElementsByTagName("head")[0] || b).appendChild(f) } m || (a.style.backgroundAttachment = "scroll"), g && D("keydown", w) } } function u(c, e, f, g) { if(g || (g = 1e3), F(e, f), s.push({ x: e, y: f, lastX: 0 > e ? .99 : -.99, lastY: 0 > f ? .99 : -.99, start: +new Date }), !t) { var h = function() { for(var i = +new Date, j = 0, k = 0, l = 0; l < s.length; l++) { var m = s[l], n = i - m.start, o = n >= b, p = o ? 1 : n / b; d && (p = H(p)); var q = m.x * p - m.lastX >> 0, r = m.y * p - m.lastY >> 0; j += q, k += r, m.lastX += q, m.lastY += r, o && (s.splice(l, 1), l--) } if(e) { var u = c.scrollLeft; c.scrollLeft += j, j && c.scrollLeft === u && (e = 0) } if(f) { var v = c.scrollTop; c.scrollTop += k, k && c.scrollTop === v && (f = 0) } e || f || (s = []), s.length ? setTimeout(h, g / a + 1) : t = !1 }; setTimeout(h, 0), t = !0 } } function v(a) { l || r(); var b = a.target, d = B(b); if(!d || a.defaultPrevented || E(n, "embed") || E(b, "embed") && /.pdf/i.test(b.src)) return !0; var e = a.wheelDeltaX || 0, f = a.wheelDeltaY || 0; e || f || (f = a.wheelDelta || 0), Math.abs(e) > 1.2 && (e *= c / 120), Math.abs(f) > 1.2 && (f *= c / 120), u(d, -e, -f), a.preventDefault() } function w(a) { var b = a.target, c = a.ctrlKey || a.altKey || a.metaKey; if(/input|textarea|embed/i.test(b.nodeName) || b.isContentEditable || a.defaultPrevented || c) return !0; if(E(b, "button") && a.keyCode === p.spacebar) return !0; var d, e = 0, f = 0, g = B(n), i = g.clientHeight; switch(g == document.body && (i = window.innerHeight), a.keyCode) { case p.up: f = -h; break; case p.down: f = h; break; case p.spacebar: d = a.shiftKey ? 1 : -1, f = .9 * -d * i; break; case p.pageup: f = .9 * -i; break; case p.pagedown: f = .9 * i; break; case p.home: f = -g.scrollTop; break; case p.end: var j = g.scrollHeight - g.scrollTop - i; f = j > 0 ? j + 10 : 0; break; case p.left: e = -h; break; case p.right: e = h; break; default: return !0 } u(g, e, f), a.preventDefault() } function x(a) { n = a.target } function A(a, b) { for(var c = a.length; c--;) y[z(a[c])] = b; return b } function B(a) { var b = [], c = o.scrollHeight; do { var d = y[z(a)]; if(d) return A(b, d); if(b.push(a), c === a.scrollHeight) { if(!j || o.clientHeight + 10 < c) return A(b, document.body) } else if(a.clientHeight + 10 < a.scrollHeight && (overflow = getComputedStyle(a, "").getPropertyValue("overflow"), "scroll" === overflow || "auto" === overflow)) return A(b, a) } while (a = a.parentNode) } function C(a, b, c) { window.addEventListener(a, b, c || !1) } function D(a, b, c) { window.removeEventListener(a, b, c || !1) } function E(a, b) { return a.nodeName.toLowerCase() === b.toLowerCase() } function F(a, b) { a = a > 0 ? 1 : -1, b = b > 0 ? 1 : -1, (k.x !== a || k.y !== b) && (k.x = a, k.y = b, s = []) } function G(a) { var b, c, d; return a *= e, 1 > a ? b = a - (1 - Math.exp(-a)) : (c = Math.exp(-1), a -= 1, d = 1 - Math.exp(-a), b = c + d * (1 - c)), b * f } function H(a) { return a >= 1 ? 1 : 0 >= a ? 0 : (1 == f && (f /= G(1)), G(a)) } var n, o, a = 150, b = 600, c = 150, d = !0, e = 5, f = 1, g = !1, h = 50, i = "", j = !1, k = { x: 0, y: 0 }, l = !1, m = !0, p = { left: 37, up: 38, right: 39, down: 40, spacebar: 32, pageup: 33, pagedown: 34, end: 35, home: 36 }, s = [], t = !1, y = {}; setInterval(function() { y = {} }, 1e4); var z = function() { var a = 0; return function(b) { return b.uniqueID || (b.uniqueID = a++) } }(); /chrome/.test(navigator.userAgent.toLowerCase()) && (C("mousedown", x), C("mousewheel", v), C("keydown", w), C("load", r)) }) }(jQuery);
直接引入即可