课程 \
JavaScript进阶篇
7-14 向下取整floor()
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Math </title>
<script type="text/javascript">
document.write(Math.floor(3.3));
</script>
</head>
<body>
</body>
</html>
2016-11-29
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7-15 四舍五入round()
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Math </title>
<script type="text/javascript">
var x=3.3;
document.write(Math.round(x));
</script>
</head>
<body>
</body>
</html>
2016-11-29
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10-1 编程挑战
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>实践题 - 选项卡</title>
<style type="text/css">
/* CSS样式制作 */
*{margin:0;padding:0;font:normal 12px "微软雅黑";color:#000000;}
ul{list-style-type: none;}
a{text-decoration: none;}
#tab-list{width: 275px;height:190px;margin: 20px auto;}
#ul1{border-bottom: 2px solid #8B4513;height: 32px;}
#ul1 li{display: inline-block;width: 60px;line-height: 30px;text-align: center;border: 1px solid #999;border-bottom: none;margin-left: 5px;}
#ul1 li:hover{cursor: pointer;}
#ul1 li.active{border-top:2px solid #8B4513;border-bottom:2px solid #FFFFFF;}
#tab-list div{border: 1px solid #7396B8;border-top: none;}
#tab-list div li{height: 30px;line-height: 30px;text-indent: 8px;}
.show{display: block;}.hide{display: none;}
</style>
<script type="text/javascript">
window.onload = function() {
var oUl1 = document.getElementById("ul1");
var aLi = oUl1.getElementsByTagName("li");
var oDiv = document.getElementById("tab-list");
var aDiv = oDiv.getElementsByTagName("div");
for(var i = 0; i < aLi.length; i++) {
aLi[i].index = i;
aLi[i].onmouseover = function() {
for(var i = 0; i < aLi.length; i++) {
aLi[i].className = "";
}
this.className = "active";
for(var j = 0; j < aDiv.length; j++) {
aDiv[j].className = "hide";
}
aDiv[this.index].className = "show";
}
}
}
</script>
</head>
<body>
<!-- HTML页面布局 -->
<div id="tab-list">
<ul id="ul1">
<li class="active">房产</li><li>家居</li><li>二手房</li>
</ul>
<div>
<ul>
<li><a href="javascript:;">275万购昌平邻铁三居 总价20万买一居</a></li>
<li><a href="javascript:;">200万内购五环三居 140万安家东三环</a></li>
<li><a href="javascript:;">北京首现零首付楼盘 53万购东5环50平</a></li>
<li><a href="javascript:;">京楼盘直降5000 中信府 公园楼王现房</a></li>
</ul>
</div>
<div class="hide">
<ul>
<li><a href="javascript:;">40平出租屋大改造 美少女的混搭小窝</a></li>
<li><a href="javascript:;">经典清新简欧爱家 90平老房焕发新生</a></li>
<li><a href="javascript:;">新中式的酷色温情 66平撞色活泼家居</a></li>
<li><a href="javascript:;">瓷砖就像选好老婆 卫生间烟道的设计</a></li>
</ul>
</div>
<div class="hide">
<ul>
<li><a href="javascript:;">通州豪华3居260万 二环稀缺2居250w甩</a></li>
<li><a href="javascript:;">西3环通透2居290万 130万2居限量抢购</a></li>
<li><a href="javascript:;">黄城根小学学区仅260万 121平70万抛!</a></li>
<li><a href="javascript:;">独家别墅280万 苏州桥2居优惠价248万</a></li>
</ul>
</div>
</div>
</body>
</html>
2016-11-29
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9-22 编程练习
<!DOCTYPE html>
<html>
<head>
<title> new document </title>
<meta http-equiv="Content-Type" content="text/html; charset=gbk"/>
<script type="text/javascript">
window.onload = function(){
var tr=document.getElementsByTagName("tr");
for(var i=0;i<tr.length;i++)
{
bgcChange(tr[i]);
}
}
function bgcChange(obj)
{
obj.onmouseover=function(){
obj.style.backgroundColor="yellow";
}
obj.onmouseout=function(){
obj.style.backgroundColor="black"
}
}
// 编写一个函数，供添加按钮调用，动态在表格的最后一行添加子节点；
var num=2;
function add(){
num++;
var tr=document.createElement("tr");
var con2=document.createElement("td");
var con3=document.createElement("td");
con2.innerHTML="xh00"+num;
con3.innerHTML="第"+num+"学生";
var del=document.createElement("td");
del.innerHTML="<a href='javascript:;'onclick='dele()' >删除</a>";//注意这里是单引号
var tab=document.getElementById("table");
tab.appendChild(tr);
tr.appendChild(con2);
tr.appendChild(con3);
tr.appendChild(del);
var tr = document.getElementsByTagName("tr");
for(var i= 0;i<tr.length;i++)
{
bgcChange(tr[i]);
}
}
// 创建删除函数
function del(obj)
{
var tr=obj.parentNode.parentNode;
tr.parentNode.removeChild(tr);
}
</script>
</head>
<body>
<table border="1" width="50%" id="table">
<tr>
<th>学号</th>
<th>姓名</th>
<th>操作</th>
</tr>
<tr>
<td>xh001</td>
<td>王小明</td>
<td><a href="javascript:;"onclick="del(this);">删除</a></td> <!--在删除按钮上添加点击事件 -->
</tr>
<tr>
<td>xh002</td>
<td>刘小芳</td>
<td><a href='javascript:;'onclick='del(this);'>删除</a></td> <!--在删除按钮上添加点击事件 -->
</tr>
</table>
<input type="button" value="添加一行" onclick="add()" /> <!--在添加按钮上添加点击事件 -->
</body>
</html>
2016-11-20
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9-21 网页卷去的距离与偏移量
<!DOCTYPE HTML>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript">
function req(){
var div = document.getElementById("div1");
document.getElementById("li1").innerHTML = (div.offsetTop)+"px";//div1距离屏幕顶部的距离
document.getElementById("li2").innerHTML = (div.offsetLeft)+"px";//div1距离屏幕左部的距离
document.getElementById("li3").innerHTML = (div.scrollTop)+"px";//div1纵向滚动条滚动的距离
document.getElementById("li4").innerHTML = (div.scrollLeft)+"px";//div1横向滚动条滚动的距离
}
</script>
</head>
<body style="border:10px solid #ccc;padding:0px 0px;margin:5px 10px">
<div style="width:60%;border-right:1px dashed red;float:left;">
<div style="float:left;">
<div id="div1" style="border:5px red solid;height:300px;width:200px;overflow:auto">
<div style="height:500px;width:400px">请调整横竖滚动条后，点击按钮后查看offsetTop、offsetLeft、scrollTop、scrollLeft值。</div>
</div>
<input type="button" value="点击我!" onclick="req()" style="border: 1px solid purple;height: 25px;"/>
</div>
</div>
<div style="width:30%;float:left;">
<ul style="list-style-type: none; line-height:30px;">结果：
<li>offsetTop : <span id="li1"></span></li>
<li>offsetLeft : <span id="li2"></span></li>
<li> scrollTop : <span id="li3"></span></li>
<li>scrollLeft : <span id="li4"></span></li>
</ul>
</div>
<div style="clear:both;"></div>
</body>
</html>
2016-11-20
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9-20 网页尺寸offsetHeight
<!DOCTYPE HTML>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<script type="text/javascript">
var h=document.documentElement.offsetHeight;
document.write(h+"<br>");
var w=document.documentElement.offsetWidth;
document.write(w+"<br>");
</script>
</body>
</html>
2016-11-20
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9-19 网页尺寸scrollHeight
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<script type="text/javascript">
var w=document.documentElement.scrollWidth;
document.write(w+"<br>");
var h=document.documentElement.scrollHeight;
document.write(h);
</script>
</body>
</html>
2016-11-20
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9-18 浏览器窗口可视区域大小
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<script type="text/javascript">
var h=window.innerWidth;
document.write(h);
</script>
</body>
</html>
2016-11-20
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9-17 创建文本节点createTextNode
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<style type="text/css">
.message{
width:200px;
height:100px;
background-color:#CCC;}
</style>
</head>
<body>
<script type="text/javascript">
var p=document.createElement("p");
p.className="message";
var con=document.createTextNode("i love javascript");
p.appendChild(con);
document.body.appendChild(p);
</script>
</body>
</html>
2016-11-20
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9-16 创建元素节点createElement
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<script type="text/javascript">
var main = document.body;
//创建链接
function createa(url,text)
{
var btn=document.createElement("a");
btn.setAttribute("href",url);
btn.innerHTML=text;
main.appendChild(btn);
}
// 调用函数创建链接
createa(" http://www.imooc.com","慕课网");
</script>
</body>
</html>
2016-11-20
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9-15 替换元素节点replaceChild()
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<div><b id="oldnode">JavaScript</b>是一个很常用的技术，为网页添加动态效果。</div>
<a href="javascript:replaceMessage()"> 将加粗改为斜体</a>
<script type="text/javascript">
function replaceMessage(){
var newnode=document.createElement("i");
var newnodeText=document.createTextNode("js");
newnode.appendChild(newnodeText);
var oldnode=document.getElementById("oldnode");
oldnode.parentNode.replaceChild(newnode,oldnode);
}
</script>
</body>
</html>
2016-11-20
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9-14 删除节点removeChild()
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<div id="content">
<h1>html</h1>
<h1>php</h1>
<h1>javascript</h1>
<h1>jquery</h1>
<h1>java</h1>
</div>
<script type="text/javascript">
function clearText()
{
var x=document.getElementById("content");
for(var i=0;i<x.childNodes.length;i++)
{
x.removeChild(x.childNodes[i]);
}
}
</script>
<button onclick="clearText()">清除节点内容</button>
</body>
</html>
2016-11-20
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9-13 插入节点insertBefore()
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<ul id="test"><li>JavaScript</li><li>HTML</li></ul>
<script type="text/javascript">
var otest = document.getElementById("test");
var otest2 = document.getElementsByTagName("li")[1];
var otest3 = document.createElement("li");
otest3.innerHTML="PHP";
otest.insertBefore(otest3,otest2);
</script>
</body>
</html>
2016-11-19
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9-12 插入节点appendChild()
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<ul id="test">
<li>JavaScript</li>
<li>HTML</li>
</ul>
<script type="text/javascript">
var otest = document.getElementById("test");
var newnode=document.createElement("li");
newnode.innerHTML="PHP";
otest.appendChild(newnode);
</script>
</body>
</html>
2016-11-19
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9-11 访问兄弟节点
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>nextSibling</title>
</head>
<body>
<ul id="u1">
<li id="a">javascript</li>
<li id="b">jquery</li>
<li id="c">html</li>
</ul>
<ul id="u2">
<li id="d">css3</li>
<li id="e">php</li>
<li id="f">java</li>
</ul>
<script type="text/javascript">
function get_nextSibling(n){
var x=n.nextSibling;
while (x && x.nodeType!=1){
x=x.nextSibling;
}
return x;
}
var x=document.getElementsByTagName("li")[0];
document.write(x.nodeName);
document.write(" = ");
document.write(x.innerHTML);
var y=get_nextSibling(x);
if(y!=null){
document.write("<br />nextsibling: ");
document.write(y.nodeName);
document.write(" = ");
document.write(y.innerHTML);
}else{
document.write("<br>已经是最后一个节点");
}
</script>
</body>
</html>
2016-11-19
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9-10 访问父节点parentNode
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<ul id="con">
<li id="lesson1">javascript
<ul>
<li id="tcon"> 基础语法</li>
<li>流程控制语句</li>
<li>函数</li>
<li>事件</li>
<li>DOM</li>
</ul>
</li>
<li id="lesson2">das</li>
<li id="lesson3">dadf</li>
<li id="lesson4">HTML/CSS
<ul>
<li>文字</li>
<li>段落</li>
<li>表单</li>
<li>表格</li>
</ul>
</li></ul>
<script type="text/javascript">
var mylist = document.getElementById("tcon");
var mycon=mylist.parentNode.parentNode.parentNode.firstChild;
document.write(mycon.innerHTML);
</script>
</body>
</html>
2016-11-19
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9-9 访问子节点的第一和最后项
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<div id="con"><p>javascript</p><div>jQuery</div><h5>PHP</h5></div>
<script type="text/javascript">
var x=document.getElementById("con");
document.write("指定元素的第一个子节点"+x.firstChild.nodeName+" "+x.firstChild.nodeValue+" "+x.firstChild.nodeType+"<br/>");
document.write("指定元素的最后一个子节点"+x.lastChild.nodeName+" "+x.firstChild.nodeValue+" "+x.firstChild.nodeType);
</script>
</body>
</html>
2016-11-19
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9-8 访问子节点childNodes
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<div>
javascript
<p>javascript</p>
<div>jQuery</div>
<h5>PHP</h5>
</div>
<script type="text/javascript">
var con=document.getElementsByTagName("div")[0].childNodes;
for(var i=0;i<con.length;i++)
{
document.write("第"+i+"个节点的节点名称："+con[i].nodeName+"<br>");
document.write("第"+i+"个节点的节点值："+con[i].nodeValue+"<br>");
document.write("第"+i+"个节点的节点类型："+con[i].nodeType+"<br>");
}
</script>
</body>
</html>
2016-11-19
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9-7 节点属性
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>节点属性</title>
</head>
<body>
<ul>
<li>javascript</li>
<li>HTML/CSS</li>
<li>jQuery</li>
</ul>
<script type="text/javascript">
var lists = document.getElementsByTagName("li");
for(var i=0;i<lists.length;i++)
{
document.write("第"+i+"个节点的名称是"+lists[i].nodeName+"<br />");
document.write("第"+i+"个节点的值是"+lists[i].nodeValue+"<br />");
document.write("第"+i+"个节点的类型是"+lists[i].nodeType+"<br />");
document.write("<br />");
}
</script>
</body>
</html>
2016-11-18
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