标签:html javascript
Javascript是目前最流行的服务器脚本语言,使用Javascript可以为网页添加丰富的逻辑和更加复杂动态效果。
代码整理自w3school:http://www.w3school.com.cn
效果图:
示例代码:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="Content-Language" content="zh-cn" /> <title>Javascript 简介</title> <head type="text/css"> <style> body {background-color:#e0e0e0} p.nowrap {display:inline;padding-left:10px} </style> </head> <body> <h3>(一)写入 HTML 输出</h3> <script> document.write("<h2>This is a h2-line.</h2>"); document.write("<p>This is a paragraph.</p>"); </script> <h3>(二)事件响应</h3> <p>JavaScript 能够对事件作出反应。比如对按钮的点击:</p> <button type="button" onclick="alert('Welcome!')">点击这里</button> <h3>(三)改变 HTML 内容</h3> <p id="test_content">这是一行作为示例的文字</p> <script> function changeHtmlContent(){ x = document.getElementById("test_content"); x.innerHTML = "Hello Javascript!"; } </script> <button type="button" onclick="changeHtmlContent()">点击按钮,改变网页内容</button> <h3>(四)改变 HTML 组件的属性</h3> <p>点击灯泡,控制开关状态:</p> <img id="light" src="images/eg_bulboff.gif" width="80px" height="120px" onclick="changeImage()"> <script> function changeImage(){ element = document.getElementById("light"); if (element.src.match("bulbon")){ element.src="images/eg_bulboff.gif"; }else{ element.src="images/eg_bulbon.gif" } } </script> <p id="text_to_changeColor">点击按钮,改变文字颜色<p> <button type="button" onclick="changeColor()">改变颜色</button> <script> function changeColor(){ element = document.getElementById("text_to_changeColor"); element.style.color="#FF0000" } </script> <h3>(五)验证输入</h3> <input id="numberText" type="text"/> <input type="submit" value="确认" onclick="testInput()"/><p class="nowrap" id="isOK"></p> <script> function testInput(){ var x = document.getElementById("numberText").value; if (x==""){ alert("请输入内容") }else if(isNaN(x)){ alert("不是数字类型!") }else{ document.getElementById("isOK").innerHTML="输入正确"; } } </script> </body> </html>
Javascript:基础(输出/编辑内容、编辑属性、事件响应、输入验证)
标签:html javascript
原文地址:http://blog.csdn.net/books1958/article/details/42081927