<html>
<head>
<title>内容赋值</title>
</head>
<body>
<script language="javascript">
<!--
function showtxt(){
objtxt = document.form1.txt;
alert("你输入的内容为: " + objtxt.value);
}
//-->
</script>
<form name="form1">
<input type="text" name="txt">
<input type="button" value ="显示" onClick="showtxt()">
</form>
</body>
</html>