javascript简单事件处理和with用法

来源：互联网发布：淘宝先装修后上架编辑：程序博客网时间：2024/06/11 00:02

这一期介绍一些简单的事件处理：

1.鼠标点击

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head>  <title> New Document </title>  <meta name="Generator" content="EditPlus">  <meta name="Author" content="">  <meta name="Keywords" content="">  <meta name="Description" content="">  <script type="text/javascript">  function click1(obj)  {  alert(obj.innerHTML);  }  </script> </head> <body>  <div onclick="click1(this)" style="cursor:pointer">点击我吧</div> </body></html>

this即div的上下文，点击后会弹出<div>之间的内容。

2.鼠标移动：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head>  <title> New Document </title>  <meta name="Generator" content="EditPlus">  <meta name="Author" content="">  <meta name="Keywords" content="">  <meta name="Description" content="">  <script type="text/javascript">  function mouse1(obj)  {  obj.style.color = "#f00";  obj.style.fontSize = "18px"  }   function mouse2(obj)  {  obj.style.color = "#000";  obj.style.fontSize = "16px"  }  </script> </head> <body>  <div onmouseover="mouse1(this)" onmouseout="mouse2(this)">移动到这儿</div> </body></html>

onmouseover鼠标放到那儿时，会把字体变大，字体成为红色，离开时字体和颜色恢复。

3.with用法：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head>  <title> New Document </title>  <meta name="Generator" content="EditPlus">  <meta name="Author" content="">  <meta name="Keywords" content="">  <meta name="Description" content="">  <script type="text/javascript">  with(document)  {  write("niujiabin"+"<br/>");  write("maybe"+"<br/>");  write("gossip"+"<br/>");  }  </script></head> <body> </body></html>

效果与如下相同：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head>  <title> New Document </title>  <meta name="Generator" content="EditPlus">  <meta name="Author" content="">  <meta name="Keywords" content="">  <meta name="Description" content="">  <script type="text/javascript">    document.write("niujiabin"+"<br/>");  document.write("maybe"+"<br/>");  document.write("gossip"+"<br/>");    </script></head> <body> </body></html>