简单实现js浮动框
作者：key_zhaojd
这篇文章主要为大家详细介绍了如何简单实现js浮动框，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
本文实例为大家分享了js浮动框的实现代码，供大家参考，具体内容如下
一.在需要加入浮动框的页面中加入如下css代码：
<!-- 浮动窗口样式css begin -->
<style type="text/css">
#msg_win {
border: 1px solid #A67901;
background: #EAEAEA;
width: 240px;
position: absolute;
right: 0;
font-size: 12px;
font-family: Arial;
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;
font-weight: bold;
width: 14px;
height: 22px;
line-height: 22px;
padding: 1px;
text-decoration: none;
font-family: webdings;
}
.icos a:hover {
color: #fff;
}
#msg_title {
background: #BBDEF6;
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: 5px;
margin-right: 0;
width: 230px;
height: 126px;
overflow: hidden;
}
</style>
<!-- 浮动窗口样式css end -->
二.js代码(注意：该代码要添加整个页面最后，目的是页面加载完成时加载它)
<!-- 浮动窗口js，必须要放置到最后 begin-->
<script type="text/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],'展开'];
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>
<!-- 浮动窗口js end-->
三.html代码(注意：该代码要放置到body的最后)
<!-- 浮动窗口html代码 begin -->
<hr>
<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">设备运行情况--></div>
<div id="msg_content" style="overflow: auto; height: 150px; width: 100%; white-space: nowrap">
${commonMsg.devRun }
</div>
</div>
<!-- 浮动窗口html代码 end -->
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。