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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<input type="text" name="textfield" id="textfield" onkeydown="document.getElementById('textfield2').value=this.value"/>
---
<label>
<input type="text" name="textfield2" id="textfield2" />
</label>
</form>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<input type="text" name="textfield" id="textfield" onkeydown="document.getElementById('textfield2').value=this.value"/>
---
<label>
<input type="text" name="textfield2" id="textfield2" />
</label>
</form>
</body>
</html>
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