ebenroux
asked on
IFrame Load Error causes javascript to stop
Hello Experts!
I have an IFrame that displays text ads from another site. When this site is unavailable (as is the case during my development) the loading of the IFrame fails as the 'src' arguments points to a non-existent URL.
Now I also have a javascript menu doing it's voodoo to the left of the form, well... not quite. As soon as the IFrame loading fails it does not run the javascript.
So I need some way to either get the javascript running, or get the IFrame to behave in a better fashion (fail gracefully --- if there really is such a thing).
Regards,
Eben
I have an IFrame that displays text ads from another site. When this site is unavailable (as is the case during my development) the loading of the IFrame fails as the 'src' arguments points to a non-existent URL.
Now I also have a javascript menu doing it's voodoo to the left of the form, well... not quite. As soon as the IFrame loading fails it does not run the javascript.
So I need some way to either get the javascript running, or get the IFrame to behave in a better fashion (fail gracefully --- if there really is such a thing).
Regards,
Eben
please post the code
ASKER
Hello again,
Actually I had another look. It appears as though the scripts run AFTER the IFrame has completed loading.
Is this normal behaviour?
Eben
Actually I had another look. It appears as though the scripts run AFTER the IFrame has completed loading.
Is this normal behaviour?
Eben
you can insert the script at the head of the document
do u have anyscript that runs onload?
do u have anyscript that runs onload?
Hi ebenroux,
About your error page:
If you have server side scripting you can check if the url exists before asking the Iframe to display it. This will allow you to display something else in that space if the URL is not responding.
For example, PHP code:
<?php
if (@fclose(@fopen("http://www.example.com", "r"))) {
print("File exists.);
} else {
print("File does not exist.");
}
?>
Best regards,
Esopo.
About your error page:
If you have server side scripting you can check if the url exists before asking the Iframe to display it. This will allow you to display something else in that space if the URL is not responding.
For example, PHP code:
<?php
if (@fclose(@fopen("http://www.example.com", "r"))) {
print("File exists.);
} else {
print("File does not exist.");
}
?>
Best regards,
Esopo.
ASKER
Hi,
Archrajan: I have tried putting the script all over the place, even the HEAD to no avail. I have no ONLOAD code either.
Esopo: That is not a bad idea I guess. I am using .NET, though and am not aware of how to do such a test.
Thanks
Eben
Archrajan: I have tried putting the script all over the place, even the HEAD to no avail. I have no ONLOAD code either.
Esopo: That is not a bad idea I guess. I am using .NET, though and am not aware of how to do such a test.
Thanks
Eben
its the nature of javascript to behave that way when the page has some errors..
it normally says object expected error.
try doing a
try
catch
it normally says object expected error.
try doing a
try
catch
ASKER
Hey Archrajan,
Now that you mention it it does makes some form of sense, but the IFrame is supposed to be a self-contained little windowed entity. If this is not the case, how can it be convinced to act as such?
Eben
Now that you mention it it does makes some form of sense, but the IFrame is supposed to be a self-contained little windowed entity. If this is not the case, how can it be convinced to act as such?
Eben
use try catch see a simple example...
the name of the function is mispelt.. instead o throwing an error it catches it and displays it..
pls post ur code... so tat we cud take a look at whats causing u the error
meanwhile see this example
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta name="Keywords" content="">
<meta name="Description" content="">
<meta name="Created" content="">
<meta name="Last Updated" content="">
<title>Runtime Error Handling</title>
<style>
BODY {
background-color : #ffffff;
}
#header {
color : #000000;
font : bold 30px Verdana, Geneva,
Arial, Helvetica, sans-serif;
}
</style>
<script language="JavaScript">
<!--
var msg = null
function testHelloWorld()
{
try
{
heloWorld()
}
catch(errorObject)
{
msg = "There was an error on this page.\n\n"
msg += "An internal programming error may keep\n"
msg += "this page from displaying properly.\n"
msg += "Click OK to continue.\n\n"
msg += "Error number: " +
(errorObject.number & 0xffff) + "\n"
msg += "Description: " +
errorObject.description +
"\n\n"
alert(msg)
}
}
function helloWorld()
{
alert("Hello World!")
}
//-->
</script>
</head>
<body>
<div align="center" id="header">
Handling Client-side Runtime Errors
</div>
<p>
<div align="center">
<input type="Button"
name="errorBtn1" value="View Message"
onclick="testHelloWorld();
</div>
</p>
</body>
</html>
the name of the function is mispelt.. instead o throwing an error it catches it and displays it..
pls post ur code... so tat we cud take a look at whats causing u the error
meanwhile see this example
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta name="Keywords" content="">
<meta name="Description" content="">
<meta name="Created" content="">
<meta name="Last Updated" content="">
<title>Runtime Error Handling</title>
<style>
BODY {
background-color : #ffffff;
}
#header {
color : #000000;
font : bold 30px Verdana, Geneva,
Arial, Helvetica, sans-serif;
}
</style>
<script language="JavaScript">
<!--
var msg = null
function testHelloWorld()
{
try
{
heloWorld()
}
catch(errorObject)
{
msg = "There was an error on this page.\n\n"
msg += "An internal programming error may keep\n"
msg += "this page from displaying properly.\n"
msg += "Click OK to continue.\n\n"
msg += "Error number: " +
(errorObject.number & 0xffff) + "\n"
msg += "Description: " +
errorObject.description +
"\n\n"
alert(msg)
}
}
function helloWorld()
{
alert("Hello World!")
}
//-->
</script>
</head>
<body>
<div align="center" id="header">
Handling Client-side Runtime Errors
</div>
<p>
<div align="center">
<input type="Button"
name="errorBtn1" value="View Message"
onclick="testHelloWorld();
</div>
</p>
</body>
</html>
ASKER
Ah archrajan,
But you see: all script on the page is 100% correct. The problem arises when the IFrame loading fails since the 'src' points to a non-existent url.
Eben
But you see: all script on the page is 100% correct. The problem arises when the IFrame loading fails since the 'src' points to a non-existent url.
Eben
Aside from the javascript discussion:
Checking if the URL is valid its very important in your case since you already know it tends to fail. I don't think you want an ugly "page not found" in the middle of your site. I am not a .NET coder but these might help you:
- http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/101476
- http://www.developerfusion.com/show/1605/
Esopo.
Checking if the URL is valid its very important in your case since you already know it tends to fail. I don't think you want an ugly "page not found" in the middle of your site. I am not a .NET coder but these might help you:
- http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/101476
- http://www.developerfusion.com/show/1605/
Esopo.
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ASKER
Thanks Alex,
Actually I found this solution myself today, but since you came up with it have some points.
Apparently this script runs after all the elements on the page has loaded. This includes images. Something to bear in mind for the future. I can just imagine that the load failure causes the rest of the loading on the page to halt.
Regards,
Eben
Actually I found this solution myself today, but since you came up with it have some points.
Apparently this script runs after all the elements on the page has loaded. This includes images. Something to bear in mind for the future. I can just imagine that the load failure causes the rest of the loading on the page to halt.
Regards,
Eben