本文介绍如何在页面加载时直接执行JavaScript代码，通过示例展示了将JS代码置于<script>标签内并放置于<head>或<body>中的方法。同时讲解了HTML中不存在<label>标签时如何用<span>替代，并通过JavaScript进行操作。
1. how to execute javascript when load page ?
Wrap the code derectly between <script laguage="javascript"> </script> but not in a function. The js code could be wrapped in <head> </head> or in <body> </body>.
Example:
<html><head><title>execute javascript when load</title>
<script language="javascript">...
document.write("<table>");
for(var i = 0; i < 10; i++) ...{ document.write("<tr><td>" + i + "</td></tr>");
} document.write("</table>");
alert("alert when loaded");</script></head><body></body></html>2. <span> </span> for <label> </lable>
In many Language, there exists a LABLE tag. However, this is no Label in HTML. So we can use SPAN instead of lable and use javascript to control it.
Example:
<html><script language="javascript">...function showLabel() ...{ document.getElementById("test").innerHTML = "Hehe, newweapon say HELLO 2 U!";}</script><input type="button" onclick="showLabel()" value="showLabel" /><br/>Label:<span id="test" ></span></html>
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