javascript基础总结之实例(二)

最新推荐文章于 2025-09-06 08:01:57 发布

转载最新推荐文章于 2025-09-06 08:01:57 发布 · 60 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/wangjinke/p/4784495.html

文章标签：

#javascript #xhtml #ViewUI

本文介绍了如何使用JavaScript进行网页元素的基本操作，包括显示和隐藏div、给div追加内容、为img元素添加属性、实现轮播图效果及获取div中的内容等。

div的显示和隐藏

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
<style type="text/css">
#div1{color:red;border:5px solid purple;width:300px;height:200px;}
</style>
<script type="text/javascript">
function show(){
    var ob=document.getElementById('div1');
    ob.style.display="block";
}
function hide(){
    var ob=document.getElementById('div1');
    ob.style.display="none";
}
</script>
</head>
<body>
<div id="div1">div-1</div>
<input onclick="show();" type="button" value="显示div"/>
<input onclick="hide();" type="button" value="隐藏div"/>
</body>
</html>

给div追加内容

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
</head>
<body>
<div id="div1"></div>
<input type="button" value="给div1追加内容"/>
</body>
</html>
<script type="text/javascript">
document.getElementsByTagName('input')[0].onclick=function(){
    document.getElementById('div1').innerHTML="nihao";
}
</script>

给img添加属性

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
<script type="text/javascript">
function fun1(){
    var obC=document.getElementsByTagName("img");
    for(var i=0;i<obC.length;i++){
        obC[i].title="tu"+(i+1);
    }
}
</script>
</head>
<body>
<img src="images/a.jpg"/>
<img src="images/b.jpg"/>
<img src="images/c.jpg"/>
<br/>
<input onclick="fun1();" type="button" value="给img增加属性title"/>
</body>
</html>

简单的轮滑效果

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
<style type="text/css">
#content{padding:3px;position:relative;width:550px;height:240px;border:5px solid orange;margin:100px auto;}
#d1,#d2,#d3,#d4{cursor:pointer;background:#abcdef;position:absolute;border:1px solid red;padding:3px 5px;}
#d1{bottom:10px;right:90px;}
#d2{bottom:10px;right:65px;}
#d3{bottom:10px;right:40px;}
#d4{bottom:10px;right:15px;}
</style>
<script type="text/javascript">
var imgName=['images/a.jpg','images/b.jpg','images/c.jpg','images/d.jpg'];
function showImage(num){
    curNum=num;
    //num 1 ----- a.jpg  2----b.jpg
    var imgPath=imgName[num-1];
    document.getElementById('image1').src=imgPath;
    //无条件把所有的块，背景置#abcdef，去掉加粗效果
    for(var i=1;i<=4;i++){
        document.getElementById('d'+i).style.background="#abcdef";
        document.getElementById('d'+i).style.fontWeight="none";
    }
    //找到当前的小方块，改变背景颜色
    document.getElementById("d"+num).style.background="yellow";
    document.getElementById("d"+num).style.fontWeight="bold";
    
}
var curNum=1;
function autoShowImg(){
    curNum++;
    if(curNum>4){
        curNum=1;
    }
    showImage(curNum);
}
</script>
</head>
<body>
<div id="content">
    <img onmouseover="clearInterval(t)" onmouseout="t=window.setInterval(autoShowImg,1500)" id="image1" src="images/a.jpg"/>
    <div id='d1' onclick="showImage(1)" style="background:yellow;font-weight:bold;">1</div>
    <div id='d2' onclick="showImage(2)">2</div>
    <div id='d3' onclick="showImage(3)">3</div>
    <div id='d4' onclick="showImage(4)">4</div>
</div>
</body>
</html>
<script type="text/javascript">
var t=window.setInterval(autoShowImg,1500);
</script>

获取div中的内容

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
<style type="text/css">
</style>
<script type="text/javascript">
function getContent(){
    var content=document.getElementById('div1').innerHTML;
    alert(content.replace(/<.*?>/g,""));
}
</script>
</head>
<body>
<div id="div1">div-1<b>nn</b></div>
<input onclick="getContent();" type="button" value="获取div的内容"/>
</body>
</html>

转载于:https://www.cnblogs.com/wangjinke/p/4784495.html