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onmousedown="SomeJavaScriptCode"
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SomeJavaScriptCode ±ØÐè¡£¹æ¶¨¸Ãʼþ·¢ÉúʱִÐÐµÄ JavaScript¡£

Ö§³Ö¸ÃʼþµÄ HTML ±êÇ©£º

<a>, <address>, <area>, <b>, <bdo>, <big>, <blockquote>, <body>, <button>, 
<caption>, <cite>, <code>, <dd>, <dfn>, <div>, <dl>, <dt>, <em>, <fieldset>, 
<form>, <h1> to <h6>, <hr>, <i>, <img>, <input>, <kbd>, <label>, <legend>, 
<li>, <map>, <ol>, <p>, <pre>, <samp>, <select>, <small>, <span>, <strong>, 
<sub>, <sup>, <table>, <tbody>, <td>, <textarea>, <tfoot>, <th>, <thead>, 
<tr>, <tt>, <ul>, <var>

Ö§³Ö¸ÃʼþµÄ JavaScript ¶ÔÏó£º

button, document, link

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<img src="/i/example_mouse2.jpg" 
onmousedown="alert('You clicked the picture!')" />

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<html>
<head>
<script type="text/javascript">
function whichElement(e)
{
var targ
if (!e) var e = window.event
if (e.target) targ = e.target
else if (e.srcElement) targ = e.srcElement
if (targ.nodeType == 3) // defeat Safari bug
targ = targ.parentNode
var tname
tname=targ.tagName
alert("You clicked on a " + tname + " element.")
}
</script>
</head>

<body onmousedown="whichElement(event)">

<h2>This is a header</h2>
<p>This is a paragraph</p>
<img border="0" src="ball16.gif" alt="Ball">

</body>
</html>

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