i would like to have a link, such that when the user clicks on it, a script
is fired to go to server and check for page updates, if any, it should
request a reload, else stay silend (terminate)
is such thing possible ?
thanks
4  2615 
Mel wrote: i would like to have a link, such that when the user clicks on it, a script
is fired to go to server and check for page updates, if any, it should
request a reload, else stay silend (terminate)
is such thing possible ?
<form action="">
then make the page an ASP or PHP (or whatever you use on the server) and
let it return the HTTP status code 204 if there is no new data,
otherwise send the new data.
--
Martin Honnen http://JavaScript.FAQTs.com/
how can i return "HTTP status code 204" from my cgi script ?
any example is appreciated
"Martin Honnen" <ma*******@yaho o.de> wrote in message
news:42******** *************** @newsread2.arco r-online.net...
Mel wrote:
i would like to have a link, such that when the user clicks on it, a
script is fired to go to server and check for page updates, if any, it should
request a reload, else stay silend (terminate)
is such thing possible ?
<form action="">
then make the page an ASP or PHP (or whatever you use on the server) and
let it return the HTTP status code 204 if there is no new data,
otherwise send the new data.
--
Martin Honnen
http://JavaScript.FAQTs.com/
if you make sure that your clients have jscript activated ( i never ge
it why the MAJORITY doesnot chekc for this but uses jscript comman
which result than in NULL repsponse to the user if he switched o
jscript) than you can use XmlHTTP to communicated with the server.
Of course this is once again a pain with cross browser functionality
so best is you do a jscript class checking which browser calls an
creating the correct object.
See the XmlHttp docs for IE and Mozilla.
Joe Robe
Mel Wrote: how can i return "HTTP status code 204" from my cgi script ?
any example is appreciated
"Martin Honnen" ma*******@yahoo .de wrote in message
news:42******** *************** @newsread2.arco r-online.net...-
Mel wrote:
-
i would like to have a link, such that when the user clicks on it
a--
script--
is fired to go to server and check for page updates, if any, i
should
request a reload, else stay silend (terminate)
is such thing possible ?-
form action=""
then make the page an ASP or PHP (or whatever you use on the server
and
let it return the HTTP status code 204 if there is no new data,
otherwise send the new data.
--
Martin Honnen
http://JavaScript.FAQTs.com/
--
joer00
Mel wrote: how can i return "HTTP status code 204" from my cgi script ?
How about looking in the documentation of your favourite CGI
language/package on how to set HTTP response codes?
As you are asking in a JavaScript group I will show you an ASP solution
with JavaScript, if that doesn't help you then use an appropriate group
for your server side language, after checking its documentation and FAQ
list.
<%@ Language="JavaS cript" %>
<%
function checkForUpdates () {
// simply returning a number here
return Math.floor(Math .random() * 10) + 1;
}
var update = checkForUpdates ();
if (update < 5 && Request.ServerV ariables('REQUE ST_METHOD') == 'POST') {
Response.Status = '204 No Content';
Response.End();
}
%>
<html lang="en">
<head>
<title>form updated occasionally</title>
</head>
<body>
<form action="" method="POST">
<div>
<label>
user value:
<input type="text" name="uservalue ">
</label>
<input type="submit" value="check for updates">
</div>
<div>
<span>
updated value:
<%= update %>
</span>
</div>
</form>
</body>
</html>
--
Martin Honnen http://JavaScript.FAQTs.com/ This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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