javascript简略事件处理和with用法 _JavaScript

javascript简单事件处理和with用法

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>