<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript" >
function show() {
var _value = document.getElementById("text_1").value;
alert(_value);
} function show2() {
alert(getValue("text_1"));
}
function getValue(id) {
var _value = document.getElementById(id).value;
return _value;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="btn_1" type="button" onclick="show()" value="点击我获取Value值" /> <input id="text_1" type="text" value="测试数据"/>
<input id="btn_2" type="button" onclick="show2()" value="封装方法" />
</div>
</form>
</body>
</html>
show()和show2()方法的效果是一样的。