<html>
<body>
<a href="/home">BBB</a>
<b dir="ltr" id="aaaa" class="a b c">bbb</b>
<a dir="rtl" id="blabla" href="/">
<b>AAA</b><u dir="auto" id="ble" title="test">UUU</u>AAAAAAA
</a>
<a id="bb" dir="blalalala" href="/">BB</a>
<script>
function aa()
{
alert(document.getElementById('aaaa').className);
}
function bb()
{
document.getElementById('aaaa').className = 'abc';
alert(document.getElementsByTagName("BODY")[0].outerHTML);
}
</script>
<button onclick="return aa()">Click me!</button>
<button onclick="return bb()">Set className to abc</button>
</body>
</html>