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Check answers to Checkboxes and set alert

I'm trying to create an alert that reminds a respondent to check their answers before continuing, but I don't want to use strErrorMessage because I don't necessarily want to force a response, just throw up an alert if a sequence of checkboxes were checked.  

I have 5 checkboxes (question name is "er") with descending values:  400, 300, 250, 200,150.  Essentially if they choose 150 I'd like to remind them that they can/should check the other values without forcing them to.  
Something along the lines of (this obviously doesn't work but will hopefully show what I'm attempting):

function SSI_CustomGraphicalCheckbox(GraphicalCheckboxObj, InputObj, blnCheck)
if((InputObj.name == "er_5" && blnCheck == true) && (InputObj.name == "er_4" && blnCheck == false) )
alert("Did you check all that are acceptable?");

However, I want to make sure that they are shown the alert on submit, not necessarily immediately.  Any ideas would be greatly appreciated.  Using v. 8.4.8
asked Oct 10, 2017 by Geoff

1 Answer

0 votes
JavaScript's "confirm" function may be of interest to you.  Custom JavaScript verification like this can be used to confirm whether a respondent is sure about their response:

var confirmed = confirm('Are you sure?');
if (!confirmed) {
    strErrorMessage = 'Change answer and resubmit.';

Does that help?
answered Oct 10, 2017 by Zachary Platinum Sawtooth Software, Inc. (117,700 points)
I'll give it a shot - thanks Zachary!