Hello,
I see in the forum that someone wants to make a medium complex validation

(multi numeric field that the sum must be 100 because it is a percentage)

complex validation can have an easy but not user friendly solution

the idea is to had a "complex validation" field (big textarea) in wich the user can write javascript (a LOB in database)

this javscript must have a return true or false value and the code written is inserted in a function

for exemple if we wants to make a very easy validation on question17
(this is an exemple and this is perhaps not the best way to check this)

if type a validation formula in the "complex validation" field
--
if (thisForm.question17.value == 5) {
return true
} else {
return false;
}
--

because the complexe validation field is not empty during the generation
it will genereate something like


<input type="text" name="question17">
<script>
function validate_question17{
var thisForm = document.form; // This must be generated to avoid error
//From complexe validation field
if (thisForm.question17.value == 5) {
return true
} else {
return false;
}

//
}
<script>

<script>
function formSubmitFunction(
var finalResult = true;

// for each question if there is a validation function
var questionResult = validate_question17();
if (!questionResult) {
alert('question17 has not been validated';
finalResult = false;
}

return finalResult ;

}
</script>



of course this is not absolutly perfect because if the generate html (name of form or name of question change there will be javascript issue)

Have you tried this out in a real survey?

Please mind to switch off the xss-filter when trying to use javascript:
$filterxsshtml: This setting enables filtering of suspicious html tags in survey, group, questions and answer texts in the administration interface. Only leave this to 'false' if you absolutely trust the users you created for the administration of LimeSurvey and if you want to allow these users to be able to use Javascript, Flash Movies, etc.

Is this complex validation already in limesurvey, or is this a feature request?

This was a request but it looks lioke we can do it by just writing javascript in label text