JS 获取指定URL的时间

 1 //获得指定URL的时间
 2 function gettimestr() {
 3     var xmlhttp = new ActiveXObject("MSXML2.XMLHTTP.3.0");
 4     try {
 5         xmlhttp.open("GET", "http://open.baidu.com/special/time/", false);
 6         xmlhttp.setRequestHeader("If-Modified-Since", "q");
 7         xmlhttp.send();
 8         var dateStr = xmlhttp.getResponseHeader("Date");
 9     }
10     catch (err) {
11         //Get local time, if error
12         var time = "";
13         var date = new Date();
14         var year = date.getFullYear();
15         var month = date.getMonth() + 1;
16         var day = date.getDay() + 1;
17         var hour = date.getHours();
18         var minute = date.getMinutes();
19         var second = date.getSeconds();
20         time = year + "-" + month + "-" + day + " " + hour + ":" + minute + ":" + second;
21         return time;
22     }
23     var d = new Date(dateStr);
24     var str = d.getFullYear() + "-";
25     var Month = d.getMonth() + 1;
26     if (Month < 10) str = str + "0";
27     str = str + Month + "-";
28     if (d.getDate() < 10) str = str + "0";
29     str = str + d.getDate() + " ";
30     if (d.getHours() < 10) str = str + "0";
31     str = str + d.getHours() + ":";
32     if (d.getMinutes() < 10) str = str + "0";
33     str = str + d.getMinutes() + ":";
34     if (d.getSeconds() < 10) str = str + "0";
35     str = str + d.getSeconds();
36     return str;
37 }