httpEquiv 屬性把 content 屬性連接到 HTTP 頭部。
metaObject.httpEquiv=content-type|expires|refresh|set-cookie
本例每 5 秒刷新頁(yè)面:
<html>
<head>
<meta http-equiv="refresh" content="5" />
</head>
<body>
<script type="text/javascript">
x=document.getElementsByTagName("meta")[0];
document.write("Http equiv: " + x.httpEquiv
);
</script>
</body>
</html>
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