?
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="Generator" content="EditPlus?">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<title>Document</title>
</head>
<link rel="stylesheet" type="text/css" href="easyui.css">
<link rel="stylesheet" type="text/css" href="icon.css">
<script type="text/javascript" src="jquery-1.7.1.min.js"></script>
<script type="text/javascript" src="jquery.easyui.min.js"></script>
<script type="text/javascript">
alert( document.getElementById("xx").value);
</script>
<body>
<input type="text" id="xx" name="xx" value="0"/>
</body>
</html>
?
?
?-----------------------------*****************正解******************--------------------------------
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="Generator" content="EditPlus?">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<title>Document</title>
</head>
<link rel="stylesheet" type="text/css" href="easyui.css">
<link rel="stylesheet" type="text/css" href="icon.css">
<script type="text/javascript" src="jquery-1.7.1.min.js"></script>
<script type="text/javascript" src="jquery.easyui.min.js"></script>
<body>
<input type="text" id="xx" name="xx" value="0"/>
<script type="text/javascript">
var xx = document.getElementById("xx").value;
alert(typeof(xx));//或許代碼加載順序有關(guān)，代碼是由上而下進(jìn)行加載
</script>
</body>
</html>
?