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88 lines
2.2 KiB
88 lines
2.2 KiB
function gotoTop(acceleration,stime) {
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acceleration = acceleration || 0.1;
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stime = stime || 10;
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var x1 = 0;
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var y1 = 0;
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var x2 = 0;
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var y2 = 0;
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var x3 = 0;
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var y3 = 0;
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if (document.documentElement) {
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x1 = document.documentElement.scrollLeft || 0;
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y1 = document.documentElement.scrollTop || 0;
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}
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if (document.body) {
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x2 = document.body.scrollLeft || 0;
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y2 = document.body.scrollTop || 0;
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}
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var x3 = window.scrollX || 0;
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var y3 = window.scrollY || 0;
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// 滚动条到页面顶部的水平距离
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var x = Math.max(x1, Math.max(x2, x3));
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// 滚动条到页面顶部的垂直距离
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var y = Math.max(y1, Math.max(y2, y3));
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// 滚动距离 = 目前距离 / 速度, 因为距离原来越小, 速度是大于 1 的数, 所以滚动距离会越来越小
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var speeding = 1 + acceleration;
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window.scrollTo(Math.floor(x / speeding), Math.floor(y / speeding));
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// 如果距离不为零, 继续调用函数
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if(x > 0 || y > 0) {
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var run = "gotoTop(" + acceleration + ", " + stime + ")";
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window.setTimeout(run, stime);
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}
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}
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// JavaScript Document
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function qc_register(id, def)
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{
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var obj = document.getElementById(id);
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if (!obj || !obj.hasChildNodes())
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{
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return;
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}
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// get head & body object
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var head = null;
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var body = null;
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for (var i = 0; i < obj.childNodes.length; i++)
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{
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var node = obj.childNodes[i];
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if (node.tagName == 'DIV')
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{
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if (node.className == 'qc-head')
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head = node;
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else if (node.className == 'qc-body')
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body = node;
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}
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}
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if (!head) { return; }
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if (!body) { return; }
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// set action & default
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var items = head.getElementsByTagName('LI');
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var datas = body.getElementsByTagName('DL');
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if (items.length == 0) { return; }
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if (items.length != datas.length)
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{
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return;
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}
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var total = items.length;
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if (typeof def == 'undefined') def = 0;
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else def = parseInt(def)%total;
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if (def < 0) def += total;
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for (var i = 0; i < total; i++)
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{
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datas[i].style.display = (i == def ? '' : 'none');
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items[i].className = (i == def ? 'current' : '');
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items[i].onmouseover = function() {
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for (var k = 0; k < total; k++)
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{
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datas[k].style.display = (this == items[k] ? '' : 'none');
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items[k].className = (this == items[k] ? 'current' : '');
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}
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}
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}
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}
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