为什么内容在页面没有显示,该如何解决 _JavaScript

为什么内容在页面没有显示

JScript code

<html>
<head>
     <title>JS时间累加</title>
    <meta http-equiv = "refresh" content = "1">
     <script language="text/javascript">
    function getTime()
    {
        var objdate = new Date();
        var hour = objdate.getHours();
        var minute = objdate.getMinutes();
        var second = objdate.getSeconds();
        var time = hour +":" minute +":"+second;
        document.write("当前时间为: "+ time);
    }
    </script>
</head>
<body>
</body>
</html>

------解决方案--------------------

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JScript code
<html>
<head>
<title>JS时间累加</title>
<meta http-equiv = "refresh" content = "1">
<script language="text/javascript">
function getTime()
{
var objdate = new D……

------解决方案--------------------
var time = hour +":" minute +":"+second;
少了+号。。
var time = hour +":" + minute +":"+second;