Js/AJAX getting server date not working in IE (php not supported)

sports528 · 10-31-2007, 09:06 PM

On my server, php is not supported. So I have been trying to implement a util that uses the servers date and time to validate forms and such. I am using javascript but am having trouble with the server-side part.

I have tried in the following code, but it works only in Opera, Mozilla, Safari
In IE, i get nothing for 'st' and 'NaN' obviously for date

Code:

var xmlHttp;
function srvTime(){
   
   try {
      //Firefox, opera 8.0+, Safari
      xmlHttp = new XMLHttpRequest();
   }
   catch (err1) {
      //Internet Explorer
      try {
         xmlHttp = new ActiveXObject('Msxml2.XMLHTTP');
      }
      catch (err2) {
         try {
            xmlHttp = new ActiveXObject('Microsoft.XMLHTP');
         }
         catch (err3) {
            //AJAX not supported, use CPU time.
            alert("AJAX not supported");
         }
      }
   }
   
   xmlHttp.open('GET',window.location.href.toString(),false);
   xmlHttp.setRequestHeader("Content-Type", "text/html");
   xmlHttp.send('');
   return xmlHttp.getResponseHeader("date");
   
}
   
var st = srvTime();
var date = new Date(st);

.html file

Code:

<!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" xml:lang="en">
<head>

<script type="text/javascript" src="date.js">
</script>
</head>
<body>
<script>document.write(st);</script>
<p>converted date: </p>
<script>document.write(date);</script>
<p>cpudate: </p>
<script>document.write(Date());</script>
</body>
</html>

If i am unable to do it this way, is there a way to use perl with javascript.

A1ien51 · 11-01-2007, 02:34 PM

May I ask why are you using Ajax to display info on the current page? That seems to be a little strange.

Eric

sports528 · 11-01-2007, 10:18 PM

This information will not be displayed on the page. I am trying to use my server time, not the User's time (Date()) in javascript. These values will be used for expiration testing, and many different uses in forms. (Ex. birthdate drop-down option to be used that has the highest year to be 15 years ago.)

felgall · 11-02-2007, 02:01 AM

So why not create the page using either server side includes or Perl or whatever server side language is supported. Ajax is supposed to be used to update a page after it finishes loading and anything it could do before the page loads can be done without it.

sports528 · 11-02-2007, 08:53 PM

Because I would like to have the time functions stored in an external .js source file that can be used on different pages. So i couldn't figure out how to use SSI. and with perl, or any other server-side program, an alternative would be to have the time generated to a file called datetime and have javascript read the time from the file, but I am not sure how to do that.

but I did get the http request to work in different platforms....the code is as follows: (Although I am not sure how accurate it is since i have been unable to test it)

located in .js file

Code:

var xmlHttp;
function srvTime(){
   
   try {
      //Firefox, opera 8.0+, Safari
      xmlHttp = new XMLHttpRequest();
   }
   catch (err1) {
      //Internet Explorer
      try {
         xmlHttp = new ActiveXObject('Msxml2.XMLHTTP');
      }
      catch (err2) {
         try {
            xmlHttp = new ActiveXObject('Microsoft.XMLHTTP');
         }
         catch (eerr3) {
            //AJAX not supported, use CPU time.
            alert("AJAX not supported");
         }
      }
   }
   
   xmlHttp.open('HEAD',window.location.href.toString(),false);
   xmlHttp.setRequestHeader("Content-Type", "text/html");
   xmlHttp.send('');
   return xmlHttp.getResponseHeader("Date");
}

vikashdwi · 09-16-2009, 03:24 PM