I think the problem is that the panel refuses to use anything except "
user_id" as a parameter name. This won't work as a question ID due to the underscore.
Here is a solution I used before panel integration existed...
Place this script in the source of a short-text question.
The script will:
1) Hide the short-text question.
2) Load the
user_id URL parameter value into the text input.
This will only work if the welcome message is not used and the short-text question is in the first survey screen (group).
Code:
<script type="text/javascript" data-author="Tony Partner">
$(document).on('ready pjax:scriptcomplete',function(){
// Hide this question
$('#question{QID}').hide
// Load the 'user_id' value from the URL
var uid = getURLParameter('user_id');
$('#question{QID} input:text').val(uid);
});
function getURLParameter(name) {
return decodeURI(
(RegExp(name + '=' + '(.+?)(&|$)').exec(location.search)||[,null])[1]
);
}
</script>
