1 var Message = {
2 set: function () {//最小化与恢复状态切换
3 var set = this.minbtn.status == 1 ? [0, 1, 'block', this.char[0], '最小化'] : [1, 0, 'none', this.char[1], '恢复'];
4 this.minbtn.status = set[0];
5 this.win.style.borderBottomWidth = set[1];
6 this.content.style.display = set[2];
7 this.minbtn.innerHTML = set[3]
8 this.minbtn.title = set[4];
9 this.win.style.top = this.getY().top;
10 },
11 close: function () {//关闭
12 this.win.style.display = 'none';
13 window.onscroll = null;
14 },
15 setOpacity: function (x) {//设置透明度
16 var v = x >= 100 ? '' : 'Alpha(opacity=' + x + ')';
17 this.win.style.visibility = x <= 0 ? 'hidden' : 'visible'; //IE有绝对或相对定位内容不随父透明度变化的bug
18 this.win.style.filter = v;
19 this.win.style.opacity = x / 100;
20 },
21 show: function () {//渐显
22 clearInterval(this.timer2);
23 var me = this, fx = this.fx(0, 100, 0.1), t = 0;
24 this.timer2 = setInterval(function () {
25 t = fx();
26 me.setOpacity(t[0]);
27 if (t[1] == 0) { clearInterval(me.timer2) }
28 }, 10);
29 },
30 fx: function (a, b, c) {//缓冲计算
31 var cMath = Math[(a - b) > 0 ? "floor" : "ceil"], c = c || 0.1;
32 return function () { return [a += cMath((b - a) * c), a - b] }
33 },
34 getY: function () {//计算移动坐标
35 var d = document, b = document.body, e = document.documentElement;
36 var s = Math.max(b.scrollTop, e.scrollTop);
37 var h = /BackCompat/i.test(document.compatMode) ? b.clientHeight : e.clientHeight;
38 var h2 = this.win.offsetHeight;
39 return { foot: s + h + h2 + 2 + 'px', top: s + h - h2 - 2 + 'px' }
40 },
41 moveTo: function (y) {//移动动画
42 clearInterval(this.timer);
43 var me = this, a = parseInt(this.win.style.top) || 0;
44 var fx = this.fx(a, parseInt(y));
45 var t = 0;
46 this.timer = setInterval(function () {
47 t = fx();
48 me.win.style.top = t[0] + 'px';
49 if (t[1] == 0) {
50 clearInterval(me.timer);
51 me.bind();
52 }
53 }, 10);
54 },
55 bind: function () {//绑定窗口滚动条与大小变化事件
56 var me = this, st, rt;
57 window.onscroll = function () {
58 clearTimeout(st);
59 clearTimeout(me.timer2);
60 me.setOpacity(0);
61 st = setTimeout(function () {
62 me.win.style.top = me.getY().top;
63 me.show();
64 }, 600);
65 };
66 window.onresize = function () {
67 clearTimeout(rt);
68 rt = setTimeout(function () { me.win.style.top = me.getY().top }, 100);
69 }
70 },
71 init: function () {//创建HTML
72 function $(id) { return document.getElementById(id) };
73 this.win = $('msg_win');
74 var set = { minbtn: 'msg_min', closebtn: 'msg_close', title: 'msg_title', content: 'msg_content' };
75 for (var Id in set) { this[Id] = $(set[Id]) };
76 var me = this;
77 this.minbtn.onclick = function () { me.set(); this.blur() };
78 this.closebtn.onclick = function () { me.close() };
79 this.char = navigator.userAgent.toLowerCase().indexOf('firefox') + 1 ? ['_', '::', '×'] : ['0', '2', 'r']; //FF不支持webdings字体
80 this.minbtn.innerHTML = this.char[0];
81 this.closebtn.innerHTML = this.char[2];
82 setTimeout(function () {//初始化最先位置
83 me.win.style.display = 'block';
84 me.win.style.top = me.getY().foot;
85 me.moveTo(me.getY().top);
86 }, 0);
87 return this;
88 }
89 };
