求一段 JS 右下角弹出对话框的代码
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最佳答案
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<html>
<head>
<title>右下角广告代码</title>
<style type="text/css">
#msg_win{border:1px solid #A67901;background:#EAEAEA;width:300px;position:absolute;right:2;margin:0px;display:none;overflow:hidden;z-index:99;}
#msg_win .icos{position:absolute;top:2px;*top:0px;right:2px;z-index:9;}
.icos a{float:left;color:#833B02;margin:1px;text-align:center;text-decoration:none;font-family:webdings;}
.icos a:hover{color:#fff;}
#msg_title{background:#FECD00;border-bottom:1px solid #A67901;border-top:1px solid #FFF;border-left:1px solid #FFF;color:#000;height:25px;line-height:25px;text-indent:5px;}
#msg_content{margin:2px;width:300px;height:250px;overflow:hidden;}
</style>
</head>
<body>
<p style="height: 1000px;">
</p>
<div id="msg_win" style="display: block; top: 490px; visibility: visible; opacity: 1;">
<div class="icos">
<a id="msg_min" title="最小化" href="javascript:void 0">_</a><a id="msg_close" title="关闭"
href="javascript:void 0">×</a></div>
<div id="msg_title">
广而告之：</div>
<div id="msg_content">
<a href="http://www.baidu.com/" target="_blank">
<img src="http://q.cnblogs.com/Images/adbig.gif" width="300" height="250" border="0"></a></div>
</div>
</body>
</html>
<script language="javascript">
var Message = {
set: function () {//最小化与恢复状态切换
var set = this.minbtn.status == 1 ? [0, 1, 'block', this.char[0], '最小化'] : [1, 0, 'none', this.char[1], '恢复'];
this.minbtn.status = set[0];
this.win.style.borderBottomWidth = set[1];
this.content.style.display = set[2];
this.minbtn.innerHTML = set[3]
this.minbtn.title = set[4];
this.win.style.top = this.getY().top;
},
close: function () {//关闭
this.win.style.display = 'none';
window.onscroll = null;
},
setOpacity: function (x) {//设置透明度
var v = x >= 100 ? '' : 'Alpha(opacity=' + x + ')';
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
this.win.style.filter = v;
this.win.style.opacity = x / 100;
},
show: function () {//渐显
clearInterval(this.timer2);
var me = this, fx = this.fx(0, 100, 0.1), t = 0;
this.timer2 = setInterval(function () {
t = fx();
me.setOpacity(t[0]);
if (t[1] == 0) { clearInterval(me.timer2) }
}, 10);
},
fx: function (a, b, c) {//缓冲计算
var cMath = Math[(a - b) > 0 ? "floor" : "ceil"], c = c || 0.1;
return function () { return [a += cMath((b - a) * c), a - b] }
},
getY: function () {//计算移动坐标
var d = document, b = document.body, e = document.documentElement;
var s = Math.max(b.scrollTop, e.scrollTop);
var h = /BackCompat/i.test(document.compatMode) ? b.clientHeight : e.clientHeight;
var h2 = this.win.offsetHeight;
return { foot: s + h + h2 + 2 + 'px', top: s + h - h2 - 2 + 'px' }
},
moveTo: function (y) {//移动动画
clearInterval(this.timer);
var me = this, a = parseInt(this.win.style.top) || 0;
var fx = this.fx(a, parseInt(y));
var t = 0;
this.timer = setInterval(function () {
t = fx();
me.win.style.top = t[0] + 'px';
if (t[1] == 0) {
clearInterval(me.timer);
me.bind();
}
}, 10);
},
bind: function () {//绑定窗口滚动条与大小变化事件
var me = this, st, rt;
window.onscroll = function () {
clearTimeout(st);
clearTimeout(me.timer2);
me.setOpacity(0);
st = setTimeout(function () {
me.win.style.top = me.getY().top;
me.show();
}, 600);
};
window.onresize = function () {
clearTimeout(rt);
rt = setTimeout(function () { me.win.style.top = me.getY().top }, 100);
}
},
init: function () {//创建HTML
function $(id) { return document.getElementById(id) };
this.win = $('msg_win');
var set = { minbtn: 'msg_min', closebtn: 'msg_close', title: 'msg_title', content: 'msg_content' };
for (var Id in set) { this[Id] = $(set[Id]) };
var me = this;
this.minbtn.onclick = function () { me.set(); this.blur() };
this.closebtn.onclick = function () { me.close() };
this.char = navigator.userAgent.toLowerCase().indexOf('firefox') + 1 ? ['_', '::', '×'] : ['0', '2', 'r']; //FF不支持webdings字体
this.minbtn.innerHTML = this.char[0];
this.closebtn.innerHTML = this.char[2];
setTimeout(function () {//初始化最先位置
me.win.style.display = 'block';
me.win.style.top = me.getY().foot;
me.moveTo(me.getY().top);
}, 0);
return this;
}
};
Message.init();
</script>
这么厉害，膜拜，能不能详解每一个函数语法大概的意思。 init：function（） 和 function init（）是一样的吧。
