On Apr 21, 12:57 pm, Jacqui <jasn...@ntlworld.comwrote:
Hi,
I am trying to write a webpage that has a form on it, which gets
submitted when a button is pressed, but also has an onclick event
which does some DOM manipulation to display a waiting page.
The issue that I am facing is that in Safari, a blank screen is being
displayed rather than the waiting page. This is only happening if
there are form tags around the button
i.e., this works and brings up the waiting page:
<input type="submit" name="submit" onclick='return interstitial();'/>
whereas this does not:
<form method="get" action="<slow loading page>">
<input type="submit" name="submit" onclick='return
interstitial();'/>
</form>
This does not appear to be a problem in Firefox/IE. Has anybody else
faced this problem and would be willing to help me out with this?
<form method="GET"
action="slow_loading_page.cgi"
target="hidden_frame"
onsubmit="return interstitial(this)">
<!-- other form elements -->
<input type="submit">
</form>
<iframe name="hidden_frame" src="blank.html"
style="display: none !important"></iframe>
where
where interstetial does validation, sets waiting message and returns
true
Because form submission means leaving the current page, you have to
dump the server output to a hidden frame, otherwise it has no sense to
display any DOM waiting message - they will disappear a ms later.
If you are using an ajaxoid to submit your form then respectively you
have to cancel form submission and do the job manually, in such case
iframe is not needed:
<form method="GET"
action="slow_loading_page.cgi">
<!-- other form elements -->
<input type="button" value="Submit"
onclick="interstitial(this.form)">
</form>
1) interstitial has to show waiting message first, then over
setTimeout proceed with form submission: otherwise the screen will
never be updated.
2) a fallback should be provided in case Javascript disabled. One of
options:
<script>
document.write(''.concat(
'<input type="button" value="Submit"',
' onclick="interstitial(this.form)">'));
</script>
<noscript>
<input type="submit">
</noscript>
