javascript使用页面上使用动态时间

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><script type="text/javascript">//页面上动态时间function time() {var dt;var date = new Date();dt = date.getFullYear()+ "/"+ date.getMonth()+ "/"+ date.getDate()+ " "+ (date.getHours() <= 9 ? '0' + date.getHours() : date.getHours())+ ":"+ ((date.getMinutes() <= 9 ? '0' + date.getMinutes() : date.getMinutes()))+ ":"+ (date.getSeconds() <= 9 ? '0' + date.getSeconds() : date.getSeconds());//document.getElementById("ht").innerHTML=dt;return dt;}setInterval("document.getElementById('ht').innerHTML=time()", 1000);</script></head><body><span id="ht"></span></body></html>

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