特效
偏移量
- offsetParent用于获取定位的父级元素
- offsetParent和parentNode的区别
var box = document.getElementById('box');
console.log(box.offsetParent);
console.log(box.offsetLeft);
console.log(box.offsetTop);
console.log(box.offsetWidth);
console.log(box.offsetHeight);
客户区大小
var box = document.getElementById('box');
console.log(box.clientLeft);
console.log(box.clientTop);
console.log(box.clientWidth);
console.log(box.clientHeight);
滚动偏移
var box = document.getElementById('box');
console.log(box.scrollLeft)
console.log(box.scrollTop)
console.log(box.scrollWidth)
console.log(box.scrollHeight)
案例
- 匀速动画函数
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>title</title>
<style>
* {
margin: 0;
padding: 0;
}
input {
margin-top: 20px;
}
div {
margin-top: 30px;
width: 200px;
height: 100px;
background-color: green;
position: absolute;
}
</style>
</head>
<body>
<input type="button" value="移动到400px" id="btn1"/>
<input type="button" value="移动到800px" id="btn2"/>
<div id="dv"></div>
<script src="common.js"></script>
<script>
//div要移动,要脱离文档流---position:absolute
//如果样式的代码是在style的标签中设置,外面是获取不到
//如果样式的代码是在style的属性设置,外面是可以获取
//获取div的当前位置
//console.log(my$("dv").offsetLeft);
//点击第一个按钮移动到400px
my$("btn1").onclick = function () {
animate(my$("dv"), 400);
};
//点击第二个按钮移动到800px
my$("btn2").onclick = function () {
animate(my$("dv"), 800);
};
//动画函数---任意一个元素移动到指定的目标位置
function animate(element, target) {
//先清理定时器
clearInterval(element.timeId);
//一会要清理定时器(只产生一个定时器)
element.timeId = setInterval(function () {
//获取div的当前的位置
var current = element.offsetLeft;//数字类型,没有px
//div每次移动多少像素---步数
var step = 10;
step = current < target ? step : -step;
//每次移动后的距离
current += step;
//判断当前移动后的位置是否到达目标位置
if (Math.abs(target - current) > Math.abs(step)) {
element.style.left = current + "px";
} else {
//清理定时器
clearInterval( element.timeId );
element.style.left = target + "px";
}
}, 20);
}
</script>
</body>
</html>
- 变速动画函数
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>title</title>
<style>
* {
margin: 0;
padding: 0;
}
div {
margin-top: 20px;
width: 200px;
height: 100px;
background-color: green;
position: absolute;
left: 0;
top: 0;
}
</style>
</head>
<body>
<input type="button" value="移动到400px" id="btn1"/>
<input type="button" value="移动到800px" id="btn2"/>
<div id="dv">
<script src="common.js"></script>
<script>
//点击按钮移动div
my$("btn1").onclick = function () {
animate(my$("dv"), 400);
};
my$("btn2").onclick = function () {
animate(my$("dv"), 800);
};
//匀速动画
function animate(element, target) {
//清理定时器
clearInterval(element.timeId);
element.timeId = setInterval(function () {
//获取元素的当前位置
var current = element.offsetLeft;
//移动的步数
var step = (target-current)/10;
step = step>0?Math.ceil(step):Math.floor(step);
current += step;
element.style.left = current + "px";
if(current==target) {
//清理定时器
clearInterval(element.timeId);
}
//测试代码:
console.log("目标位置:"+target+",当前位置:"+current+",每次移动步数:"+step);
}, 20);
}
</script>
</div>
</body>
</html>
- 回到顶部
- 无缝轮播图
- 简单轮播图
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
* {
margin: 0;
padding: 0
}
ul {
list-style: none
}
img {
vertical-align: top
}
.box {
width: 730px;
height: 454px;
margin: 100px auto;
padding: 5px;
border: 1px solid #ccc;
}
.inner {
width: 730px;
height: 454px;
background-color: pink;
overflow: hidden;
position: relative;
}
.inner ul {
width: 1000%;
position: absolute;
top: 0;
left: 0;
}
.inner li {
float: left;
}
.square {
position: absolute;
right: 10px;
bottom: 10px;
}
.square span {
display: inline-block;
width: 16px;
height: 16px;
background-color: #fff;
text-align: center;
line-height: 16px;
cursor: pointer;
}
.square span.current {
background-color: orangered;
color: #fff;
}
</style>
</head>
<body>
<div class="box" id="box">
<div class="inner"><!--相框-->
<ul>
<li><a href="#"><img src="images/1.jpg" alt=""/></a></li>
<li><a href="#"><img src="images/2.jpg" alt=""/></a></li>
<li><a href="#"><img src="images/3.jpg" alt=""/></a></li>
<li><a href="#"><img src="images/4.jpg" alt=""/></a></li>
<li><a href="#"><img src="images/5.jpg" alt=""/></a></li>
<li><a href="#"><img src="images/6.jpg" alt=""/></a></li>
</ul>
<div class="square">
<span class="current">1</span>
<span>2</span>
<span>3</span>
<span>4</span>
<span>5</span>
<span>6</span>
</div>
</div>
</div>
<script src="common.js"></script>
<script>
//获取最外面的div
var box=my$("box");
//获取相框
var inner=box.children[0];
//获取相框的宽度
var imgWidth=inner.offsetWidth;
//获取ul
var ulObj=inner.children[0];
//获取所有的span标签
var spanObjs=inner.children[1].children;
//循环遍历所有的span标签,注册鼠标进入的事件
for(var i=0;i<spanObjs.length;i++){
//循环的时候把索引值保存在每个span的自定义属性中
spanObjs[i].setAttribute("index",i);
//注册鼠标进入事件
spanObjs[i].onmouseover=function () {
//先干掉所有的span的背景颜色
for(var j=0;j<spanObjs.length;j++){
//移除了每个span的类样式
spanObjs[j].removeAttribute("class");
}
//设置当前的span的背景颜色
this.className="current";
//移动ul(每个图片的宽*鼠标放在这个按钮的索引值)
//获取当前鼠标进入的span的索引
var index=this.getAttribute("index");
animate(ulObj,-index*imgWidth);
};
}
//设置任意的一个元素,移动到指定的目标位置
function animate(element, target) {
clearInterval(element.timeId);
//定时器的id值存储到对象的一个属性中
element.timeId = setInterval(function () {
//获取元素的当前的位置,数字类型
var current = element.offsetLeft;
//每次移动的距离
var step = 10;
step = current < target ? step : -step;
//当前移动到位置
current += step;
if (Math.abs(current - target) > Math.abs(step)) {
element.style.left = current + "px";
} else {
//清理定时器
clearInterval(element.timeId);
//直接到达目标
element.style.left = target + "px";
}
}, 20);
}
</script>
</body>
</html>
- 左右焦点轮播图
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
body, ul, ol, li, img {
margin: 0;
padding: 0;
list-style: none;
}
#box {
width: 520px;
height: 280px;
padding: 5px;
position: relative;
border: 1px solid #ccc;
margin: 100px auto 0;
}
.ad {
width: 520px;
height: 280px;
/*overflow: hidden;*/
position: relative;
}
#box img {
width: 520px;
}
.ad ol {
position: absolute;
right: 10px;
bottom: 10px;
}
.ad ol li {
width: 20px;
height: 20px;
line-height: 20px;
border: 1px solid #ccc;
text-align: center;
background: #fff;
float: left;
margin-right: 10px;
cursor: pointer;
_display: inline;
}
.ad ol li.current {
background: yellow;
}
.ad ul li {
float: left;
}
.ad ul {
position: absolute;
top: 0;
width: 2940px;
}
.ad ul li.current {
display: block;
}
#focusD {
display: none;
}
#focusD span {
width: 40px;
height: 40px;
position: absolute;
left: 5px;
top: 50%;
margin-top: -20px;
background: #000;
cursor: pointer;
line-height: 40px;
text-align: center;
font-weight: bold;
font-family: '黑体';
font-size: 30px;
color: #fff;
opacity: 0.3;
border: 1px solid #fff;
}
#focusD #right {
right: 5px;
left: auto;
}
</style>
</head>
<body>
<div id="box" class="all">
<div class="ad">
<ul id="imgs">
<li><img src="images/01.jpg"/></li>
<li><img src="images/02.jpg"/></li>
<li><img src="images/03.jpg"/></li>
<li><img src="images/04.jpg"/></li>
<li><img src="images/05.jpg"/></li>
</ul>
</div><!--相框-->
<div id="focusD"><span id="left"><</span><span id="right">></span>
</div>
</div>
<script src="common.js"></script>
<script>
//获取最外面的div
var box = my$("box");
//获取相框
var ad = box.children[0];
//获取相框的宽度
var imgWidth = ad.offsetWidth;
//获取ul
var ulObj = ad.children[0];
//获取左右焦点的div
var focusD = my$("focusD");
//显示和隐藏左右焦点的div----为box注册事件
box.onmouseover = function () {
focusD.style.display = "block";
};
box.onmouseout = function () {
focusD.style.display = "none";
};
//点击右边按钮
var index=0;
my$("right").onclick = function () {
if(index<ulObj.children.length-1){
index++;
animate(ulObj,-index*imgWidth);
}
};
//点击左边按钮
my$("left").onclick = function () {
if(index>0){
index--;
animate(ulObj,-index*imgWidth);
}
};
//设置任意的一个元素,移动到指定的目标位置
function animate(element, target) {
clearInterval(element.timeId);
//定时器的id值存储到对象的一个属性中
element.timeId = setInterval(function () {
//获取元素的当前的位置,数字类型
var current = element.offsetLeft;
//每次移动的距离
var step = 10;
step = current < target ? step : -step;
//当前移动到位置
current += step;
if (Math.abs(current - target) > Math.abs(step)) {
element.style.left = current + "px";
} else {
//清理定时器
clearInterval(element.timeId);
//直接到达目标
element.style.left = target + "px";
}
}, 20);
}
</script>
</body>
</html>
- 无缝连接的轮播图
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
* {
margin: 0;
padding: 0;
}
ul {
list-style: none;
}
img {
vertical-align: top;
}
/*取消图片底部3像素距离*/
.box {
width: 300px;
height: 200px;
margin: 100px auto;
background-color: pink;
border: 1px solid red;
position: relative;
overflow: hidden;
}
.box ul li {
float: left;
}
.box ul {
width: 1500px;
position: absolute;
left: 0;
top: 0;
}
</style>
</head>
<body>
<div class="box" id="screen">
<ul>
<li><img src="imagess/01.jpg" alt=""/></li>
<li><img src="imagess/02.jpg" alt=""/></li>
<li><img src="imagess/03.jpg" alt=""/></li>
<li><img src="imagess/04.jpg" alt=""/></li>
<li><img src="imagess/01.jpg" alt=""/></li>
</ul>
</div>
<script src="common.js"></script>
<script>
var current = 0;//只声明了一次
function f1() {
var ulObj = my$("screen").children[0];
current -= 10;
if (current < -1200) {
ulObj.style.left = 0 + "px";
current = 0;
} else {
ulObj.style.left = current + "px";
}
}
var timeId=setInterval(f1, 20);
my$("screen").onmouseover=function () {
//停止
clearInterval(timeId);
};
my$("screen").onmouseout=function () {
//继续
timeId=setInterval(f1, 20);
};
</script>
</body>
</html>
- 完整的轮播图
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
* {
padding: 0;
margin: 0;
list-style: none;
border: 0;
}
.all {
width: 500px;
height: 200px;
padding: 7px;
border: 1px solid #ccc;
margin: 100px auto;
position: relative;
}
.screen {
width: 500px;
height: 200px;
overflow: hidden;
position: relative;
}
.screen li {
width: 500px;
height: 200px;
overflow: hidden;
float: left;
}
.screen ul {
position: absolute;
left: 0;
top: 0px;
width: 3000px;
}
.all ol {
position: absolute;
right: 10px;
bottom: 10px;
line-height: 20px;
text-align: center;
}
.all ol li {
float: left;
width: 20px;
height: 20px;
background: #fff;
border: 1px solid #ccc;
margin-left: 10px;
cursor: pointer;
}
.all ol li.current {
background: #DB192A;
}
#arr {
display: none;
}
#arr span {
width: 40px;
height: 40px;
position: absolute;
left: 5px;
top: 50%;
margin-top: -20px;
background: #000;
cursor: pointer;
line-height: 40px;
text-align: center;
font-weight: bold;
font-family: '黑体';
font-size: 30px;
color: #fff;
opacity: 0.3;
border: 1px solid #fff;
}
#arr #right {
right: 5px;
left: auto;
}
</style>
</head>
<body>
<div class="all" id='box'>
<div class="screen"><!--相框-->
<ul>
<li><img src="images/1.jpg" width="500" height="200"/></li>
<li><img src="images/2.jpg" width="500" height="200"/></li>
<li><img src="images/3.jpg" width="500" height="200"/></li>
<li><img src="images/4.jpg" width="500" height="200"/></li>
<li><img src="images/5.jpg" width="500" height="200"/></li>
</ul>
<ol>
</ol>
</div>
<div id="arr"><span id="left"><</span><span id="right">></span></div>
</div>
<script src="common.js"></script>
<script>
//获取最外面的div
var box = my$("box");
//获取相框
var screen = box.children[0];
//获取相框的宽度
var imgWidth = screen.offsetWidth;
//获取ul
var ulObj = screen.children[0];
//获取ul中的所有的li
var list = ulObj.children;
//获取ol
var olObj = screen.children[1];
//焦点的div
var arr = my$("arr");
var pic = 0;//全局变量
//创建小按钮----根据ul中的li个数
for (var i = 0; i < list.length; i++) {
//创建li标签,加入到ol中
var liObj = document.createElement("li");
olObj.appendChild(liObj);
liObj.innerHTML = (i + 1);
//在每个ol中的li标签上添加一个自定义属性,存储索引值
liObj.setAttribute("index", i);
//注册鼠标进入事件
liObj.onmouseover = function () {
//先干掉所有的ol中的li的背景颜色
for (var j = 0; j < olObj.children.length; j++) {
olObj.children[j].removeAttribute("class");
}
//设置当前鼠标进来的li的背景颜色
this.className = "current";
//获取鼠标进入的li的当前索引值
pic = this.getAttribute("index");
//移动ul
animate(ulObj, -pic * imgWidth);
};
}
//设置ol中第一个li有背景颜色
olObj.children[0].className = "current";
//克隆一个ul中第一个li,加入到ul中的最后=====克隆
ulObj.appendChild(ulObj.children[0].cloneNode(true));
//自动播放
var timeId= setInterval(clickHandle,1000);
//鼠标进入到box的div显示左右焦点的div
box.onmouseover = function () {
arr.style.display = "block";
//鼠标进入废掉之前的定时器
clearInterval(timeId);
};
//鼠标离开到box的div隐藏左右焦点的div
box.onmouseout = function () {
arr.style.display = "none";
//鼠标离开自动播放
timeId= setInterval(clickHandle,1000);
};
//右边按钮
my$("right").onclick =clickHandle;
function clickHandle() {
//如果pic的值是5,恰巧是ul中li的个数-1的值,此时页面显示第六个图片,而用户会认为这是第一个图,
//所以,如果用户再次点击按钮,用户应该看到第二个图片
if (pic == list.length - 1) {
//如何从第6个图,跳转到第一个图
pic = 0;//先设置pic=0
ulObj.style.left = 0 + "px";//把ul的位置还原成开始的默认位置
}
pic++;//立刻设置pic加1,那么此时用户就会看到第二个图片了
animate(ulObj, -pic * imgWidth);//pic从0的值加1之后,pic的值是1,然后ul移动出去一个图片
//如果pic==5说明,此时显示第6个图(内容是第一张图片),第一个小按钮有颜色,
if (pic == list.length - 1) {
//第五个按钮颜色干掉
olObj.children[olObj.children.length - 1].className = "";
//第一个按钮颜色设置上
olObj.children[0].className = "current";
} else {
//干掉所有的小按钮的背景颜色
for (var i = 0; i < olObj.children.length; i++) {
olObj.children[i].removeAttribute("class");
}
olObj.children[pic].className = "current";
}
};
//左边按钮
my$("left").onclick = function () {
if (pic == 0) {
pic = 5;
ulObj.style.left = -pic * imgWidth + "px";
}
pic--;
animate(ulObj, -pic * imgWidth);
//设置小按钮的颜色---所有的小按钮干掉颜色
for (var i = 0; i < olObj.children.length; i++) {
olObj.children[i].removeAttribute("class");
}
//当前的pic索引对应的按钮设置颜色
olObj.children[pic].className = "current";
};
//设置任意的一个元素,移动到指定的目标位置
function animate(element, target) {
clearInterval(element.timeId);
//定时器的id值存储到对象的一个属性中
element.timeId = setInterval(function () {
//获取元素的当前的位置,数字类型
var current = element.offsetLeft;
//每次移动的距离
var step = 10;
step = current < target ? step : -step;
//当前移动到位置
current += step;
if (Math.abs(current - target) > Math.abs(step)) {
element.style.left = current + "px";
} else {
//清理定时器
clearInterval(element.timeId);
//直接到达目标
element.style.left = target + "px";
}
}, 10);
}
</script>
<script>
// var num=0;
// function f1(){
//
// num=1000;
// }
// f1();
// console.log(num);
</script>
</body>
</html>
- 模拟滚动条
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
* {
margin: 0;
padding: 0;
}
.box {
width: 300px;
height: 500px;
border: 1px solid red;
margin: 100px;
position: relative;
overflow: hidden;
}
.content {
padding: 5px 18px 5px 5px;
position: absolute;
top: 0;
left: 0;
}
.scroll {
width: 18px;
height: 100%;
position: absolute;
top: 0;
right: 0;
background-color: #eee;
}
.bar {
height: 100px;
width: 100%;
position: absolute;
top: 0;
left: 0;
background-color: red;
border-radius: 10px;
cursor: pointer;
}
</style>
</head>
<body>
<div class="box" id="box">
<div class="content" id="content">
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头
床前明月光啊，明月光，疑是地上霜啊，举头嘿嘿
</div><!--文字内容-->
<div id="scroll" class="scroll"><!--装滚动条的层-->
<div class="bar" id="bar"></div><!--滚动条-->
</div>
</div>
<script src="common.js"></script>
<script>
//获取需要的元素
//最外面的div
var box = my$("box");
//文字div
var content = my$("content");
//装滚动条的div---容器
var scroll = my$("scroll");
//滚动条
var bar = my$("bar");
//设置滚动条的高度
//滚动条的高/装滚动条的div的高=box的高/文字div的高
//滚动条的高=装滚动条的div的高*box的高/文字div的高
var height = scroll.offsetHeight * box.offsetHeight / content.offsetHeight;
bar.style.height = height + "px";
//移动滚动条
bar.onmousedown = function (e) {
var spaceY = e.clientY - bar.offsetTop;
document.onmousemove = function (e) {//移动事件
var y = e.clientY - spaceY;
y=y<0?0:y;//最小值
y=y>scroll.offsetHeight-bar.offsetHeight?scroll.offsetHeight-bar.offsetHeight:y;
bar.style.top = y + "px";
//设置鼠标移动的时候,文字不被选中
window.getSelection? window.getSelection().removeAllRanges():document.selection.empty();
//滚动条的移动距离/文字div的移动距离=滚动条最大的移动距离/文字div的最大移动距离
//文字div的移动距离=滚动条的移动距离*文字div的最大移动距离/滚动条最大的移动距离
var moveY=y*(content.offsetHeight-box.offsetHeight)/(scroll.offsetHeight-bar.offsetHeight);
//设置文字div的移动距离
content.style.marginTop=-moveY+"px";
};
};
document.onmouseup=function () {
//鼠标抬起的时候,把移动事件干掉
document.onmousemove=null;
};
</script>
</body>
</html>
- 拖拽案例
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
.login-header {
width: 100%;
text-align: center;
height: 30px;
font-size: 24px;
line-height: 30px;
}
ul, li, ol, dl, dt, dd, div, p, span, h1, h2, h3, h4, h5, h6, a {
padding: 0px;
margin: 0px;
}
.login {
width: 512px;
position: absolute;
border: #ebebeb solid 1px;
height: 280px;
left: 50%;
right: 50%;
background: #ffffff;
box-shadow: 0px 0px 20px #ddd;
z-index: 9999;
margin-left: -250px;
margin-top: 140px;
display: none;
}
.login-title {
width: 100%;
margin: 10px 0px 0px 0px;
text-align: center;
line-height: 40px;
height: 40px;
font-size: 18px;
position: relative;
cursor: move;
-moz-user-select: none; /*火狐*/
-webkit-user-select: none; /*webkit浏览器*/
-ms-user-select: none; /*IE10*/
-khtml-user-select: none; /*早期浏览器*/
user-select: none;
}
.login-input-content {
margin-top: 20px;
}
.login-button {
width: 50%;
margin: 30px auto 0px auto;
line-height: 40px;
font-size: 14px;
border: #ebebeb 1px solid;
text-align: center;
}
.login-bg {
width: 100%;
height: 100%;
position: fixed;
top: 0px;
left: 0px;
background: #000000;
filter: alpha(opacity=30);
-moz-opacity: 0.3;
-khtml-opacity: 0.3;
opacity: 0.3;
display: none;
}
a {
text-decoration: none;
color: #000000;
}
.login-button a {
display: block;
}
.login-input input.list-input {
float: left;
line-height: 35px;
height: 35px;
width: 350px;
border: #ebebeb 1px solid;
text-indent: 5px;
}
.login-input {
overflow: hidden;
margin: 0px 0px 20px 0px;
}
.login-input label {
float: left;
width: 90px;
padding-right: 10px;
text-align: right;
line-height: 35px;
height: 35px;
font-size: 14px;
}
.login-title span {
position: absolute;
font-size: 12px;
right: -20px;
top: -30px;
background: #ffffff;
border: #ebebeb solid 1px;
width: 40px;
height: 40px;
border-radius: 20px;
}
</style>
</head>
<body>
<div class="login-header"><a id="link" href="javascript:void(0);">点击，弹出登录框</a></div>
<div id="login" class="login">
<div id="title" class="login-title">登录会员
<span><a id="closeBtn" href="javascript:void(0);" class="close-login">关闭</a></span></div>
<div class="login-input-content">
<div class="login-input">
<label>用户名：</label>
<input type="text" placeholder="请输入用户名" name="info[username]" id="username" class="list-input">
</div>
<div class="login-input">
<label>登录密码：</label>
<input type="password" placeholder="请输入登录密码" name="info[password]" id="password" class="list-input">
</div>
</div>
<div id="loginBtn" class="login-button"><a href="javascript:void(0);" id="login-button-submit">登录会员</a></div>
</div><!--登录框-->
<div id="bg" class="login-bg"></div><!--遮挡层-->
<script src="common.js"></script>
<script>
//获取超链接,注册点击事件,显示登录框和遮挡层
my$("link").onclick = function () {
my$("login").style.display = "block";
my$("bg").style.display = "block";
};
//获取关闭,注册点击事件,隐藏登录框和遮挡层
my$("closeBtn").onclick = function () {
my$("login").style.display = "none";
my$("bg").style.display = "none";
};
//按下鼠标,移动鼠标,移动登录框
my$("title").onmousedown = function (e) {
//获取此时的可视区域的横坐标-此时登录框距离左侧页面的横坐标
var spaceX = e.clientX - my$("login").offsetLeft;
var spaceY = e.clientY - my$("login").offsetTop;
//移动的事件
document.onmousemove = function (e) {
//新的可视区域的横坐标-spaceX====>新的值--->登录框的left属性
var x = e.clientX - spaceX+250;
var y = e.clientY - spaceY-140;
my$("login").style.left = x + "px";
my$("login").style.top = y + "px";
}
};
document.onmouseup=function () {
document.onmousemove=null;//当鼠标抬起的时候,把鼠标移动事件干掉
};
</script>
<script>
//点击超链接弹出登录框,点击页面的任何位置都可以关闭登录框
// my$("link").onclick=function (e) {
// my$("login").style.display="block";
// //return false;
// //e.preventDefault();
// //上面的两个是阻止默认事件的
// //下面的两个是阻止事件冒泡的
// //window.event.cancelBubble=true;
// e.stopPropagation();
// };
// document.onclick=function () {
// my$("login").style.display="none";
// console.log("隐藏了");
// };
</script>
</body>
</html>
- 放大镜案例
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>哈哈</title>
<style>
* {
margin: 0;
padding: 0;
}
.box {
width: 350px;
height: 350px;
margin: 100px;
border: 1px solid #ccc;
position: relative;
}
.big {
width: 400px;
height: 400px;
position: absolute;
top: 0;
left: 360px;
border: 1px solid #ccc;
overflow: hidden;
display: none;
}
.mask {
width: 175px;
height: 175px;
background: rgba(255, 255, 0, 0.4);
position: absolute;
top: 0px;
left: 0px;
cursor: move;
display: none;
}
.small {
position: relative;
}
</style>
</head>
<body>
<div class="box" id="box">
<div class="small"><!--小层-->
<img src="images/small.png" width="350" alt=""/>
<div class="mask"></div><!--遮挡层-->
</div><!--小图-->
<div class="big"><!--大层-->
<img src="images/big.jpg" width="800" alt=""/><!--大图-->
</div><!--大图-->
</div>
<!--导入外部的js文件-->
<script src="common.js"></script>
<script>
//获取需要的元素
var box = my$("box");
//获取小图的div
var small = box.children[0];
//遮挡层
var mask = small.children[1];
//获取大图的div
var big = box.children[1];
//获取大图
var bigImg = big.children[0];
//鼠标进入显示遮挡层和大图的div
box.onmouseover = function () {
mask.style.display = "block";
big.style.display = "block";
};
//鼠标离开隐藏遮挡层和大图的div
box.onmouseout = function () {
mask.style.display = "none";
big.style.display = "none";
};
//鼠标的移动事件---鼠标是在小层上移动
small.onmousemove = function (e) {
//鼠标此时的可视区域的横坐标和纵坐标
//主要是设置鼠标在遮挡层的中间显示
var x = e.clientX - mask.offsetWidth / 2;
var y = e.clientY - mask.offsetHeight / 2;
//主要是margin的100px的问题
x = x - 100;
y = y - 100;
//横坐标的最小值
x = x < 0 ? 0 : x;
//纵坐标的最小值
y = y < 0 ? 0 : y;
//横坐标的最大值
x = x > small.offsetWidth - mask.offsetWidth ? small.offsetWidth - mask.offsetWidth : x;
//纵坐标的最大值
y = y > small.offsetHeight - mask.offsetHeight ? small.offsetHeight - mask.offsetHeight : y;
//为遮挡层的left和top赋值
mask.style.left = x + "px";
mask.style.top = y + "px";
//遮挡层的移动距离/大图的移动距离=遮挡层的最大移动距离/大图的最大移动距离
//大图的移动距离=遮挡层的移动距离*大图的最大移动距离/遮挡层的最大移动距离
//大图的横向的最大移动距离
var maxX = bigImg.offsetWidth - big.offsetWidth;
//大图的纵向的最大移动距离
//var maxY = bigImg.offsetHeight - big.offsetHeight;
//大图的横向移动的坐标
var bigImgMoveX = x * maxX / (small.offsetWidth - mask.offsetWidth);
//大图的纵向移动的坐标
var bigImgMoveY = y * maxX / (small.offsetWidth - mask.offsetWidth);
//设置图片移动
bigImg.style.marginLeft = -bigImgMoveX + "px";
bigImg.style.marginTop = -bigImgMoveY + "px";
};
</script>
</body>
</html>
附录
元素的类型
版权声明：本文为tichimi3375原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接和本声明。