获取服务器时间js代码

1. function getSevertime(){
2. var xmlHttp = new XMLHttpRequest();
3. if( !xmlHttp ){
4. xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
5. }
6. xmlHttp.open("HEAD",location.href,false);
7. xmlHttp.send();
8. var severtime=new Date(xmlHttp.getResponseHeader("Date"));
9. return severtime;
10. }