Why not doing that on the server side, using the s:token approach? That
would prevent double submit on the server side.
On the client side, I would say that your disabling the button before
the form is submitted (the onsubmit technically happens before the
submit, so that you can uypdate some value before the submit of the form
actually happens) prevents the value of this button to be sent to the
server (which makes sense, since it's disabled). I would recommend not
disabling the button (as the formsubmitted var will be enough to prevent
a re-submission). If you really want to disable your button, consider a
timer that would do so 200ms after, leaving time for the form to be
submitted *with* the value of this button.
Denis.
Le 2010-05-19 05:41, RogerV a écrit :
For a long while I've been building forms along the lines of
<s:form>
......
<s:submit id="submit" type="button" label="Continue" action="processForm"/>
<s:submit id="cancel" type="button" label="Cancel"
action="goSomewhereElseWithoutSubmittingTheForm/>
which has worked well. Until today. Today I needed to prevent a double
submit on a form so I chose the quick way by creating a javascript onsubmit
handler to cancel the button after the first click and referenced it in the
s:form onsubmit handler
<script type="text/javascript">
var formsubmitted=false;
function preventDoubleSubmit() {
if (formsubmitted) {
return false;
}
var submitButton = document.getElementById('submit');
submitButton.disabled=true;
formsubmitted=true;
return true;
}
</script>
On clicking the submit button, the javascript disabled the button but the
performAction was never called and the form was redisplayed. So I tried
again, moving the javascript to the submit buttons onclick attribute. Same
thing. Looking at the POST through Firebug I see that without any javascript
handlers it looks like;
<form data>&action%3performAction=Submit
and with the javascript handlers
<form data> i.e the Struts action information is not being attached.
Is this expected or a bug? Am I handling multiple submit buttons in the
wrong way?
Regards
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