If the form does not contain <input type=file /> this is possible. Perhaps
something like this?
<form>
<div><input type="text" name="a" /></div>
<div>
<input type="submit" value="Submit" id="g" />
</div>
</form>
<script>
var ser_form = null;
jQuery(function() {
var myform = Query('form');
ser_form = myform.serialize();
myform.submit(function() {
if(ser_form == myform.serialize()) {
alert('form not changed, not submitting');
return false;
else {
alert('form changed, submitting');
return true;
}
});
}
</script>
On Sunday, 9 December 2012 21:59:55 UTC-6, Joe Barnhart wrote:
>
> Wow, I wish I could mark all of you as "best answer."
>
> Massimo -- I was thinking at lunch and wondered if I can calculate the
> same hash function on the form vars in the browser. I suppose I could at
> least create a server callback that takes the form.vars and uses the same
> hashing function to create a hash to compare with the one in the form. Is
> there an easy way to assemble the same values in the same order as the
> SQLFORM helper just using client-side javascript? That would make it
> easier to pass to the controller to hash and compare to the original form
> hash. (I'd like to do it client-side but Javascript implementations of MD5
> might be biting off a little too much.) Would that be easier than
> comparing each item, given that I have probably 50 or more items in this
> form?
>
> I could use the callback to set a visual "badge" when something had
> changed on the form as well as pop up Niphlod's ugly dialog to prevent the
> user from navigating away and losing his work. Maybe I'll go Paolo one
> better and make the Submit button blink colors! (That would probably land
> my site in WebPagesThatSuck.com)
>
>
> -- Joe B.
>
>
--
