How can I customize an input value when the form is in lightbox?

Hello Jacopo,

Yes, this is still possible but you will need to create a javascript that will accept URL parameters and assign javascript variables to the lightbox script.

You need add the property iframeParameters in your script.

example:

<script src="//www.jotform.com/min/g=feedback" type="text/javascript">
new JotformFeedback({
formId:'10563005897',
base:'http://www.jotform.com/',
iframeParameters: {
     'yourName15[first]': 'John',
     'yourName15[last]': 'Smith'
},
windowTitle:'test',
background:'#FFA500',
fontColor:'#FFFFFF',
type:false,
height:500,
width:700
});
</script>

On the above example, yourName15[first] & yourName15[last] are the field names in my form sample. The value beside it are values. If you wish for it to become a variable you will just need to remove the quotes (').

example:
     'yourName15[first]':fname_param,
     'yourName15[last]':lname_param
 
 

Posting URL parameters via javascript:

Paste this script in your HTML file (anywhere as long as it is above your jotform feedback script):

<script type="text/javascript">
function getURLparameter( name )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return results[1];
}
</script>

Now let's go back to the jotform feedback script source.  You will need to declare your variable with the function in it.

example:

var fname_param = getURLparameter( 'yourName15[first]' );
var lname_param = getURLparameter( 'yourName15[last]' );

 

Place the variable declarations above of the jotform feedback script.

example:

<script src="//www.jotform.com/min/g=feedback" type="text/javascript">

var fname_param = gup( 'yourName15[first]' );
var lname_param = gup( 'yourName15[last]' );

new JotformFeedback({
formId:'10563005897',
base:'http://www.jotform.com/',
iframeParameters: {
     'yourName15[first]':fname_param,
     'yourName15[last]':lname_param
},
windowTitle:'test',
background:'#FFA500',
fontColor:'#FFFFFF',
type:false,
height:500,
width:700
});
</script>

Now save the file and test it.

You can also check my sample running script and check the source code.  Feel free to change the parameter values:

http://ravnos.t35.com/jotform_feedbackURLparams.html?yourName15[first]=John&yourName15[last]=Smith

If you have other questions and inquiries, please let us know.

Thanks