How to hide multiple choice buttons

Question

Hi,

I need my participants to press keys on the keyboard to answer the questions. I'm using multiple choice questions with keyboard responses (using javascript). Now I just need to hide the multiple choice buttons. Here's a screenshot of where I am:

!

I'd like to hide those two buttons.
The javascript code I used for keyboard response is:

Qualtrics.SurveyEngine.addOnload(function() {
                this.hideNextButton();

this.hidePreviousButton();

var that = this;

Event.observe(document, 'keydown', function keydownCallback(e) {

var choiceID = null;

switch (e.keyCode) {

case 80: // 'p' was pressed

choiceID = 1;

break;

case 78: // 'n' was pressed

choiceID = 2;

break;

}

if (choiceID) {

Event.stopObserving(document, 'keydown', keydownCallback);

that.setChoiceValue(choiceID, true);

that.clickNextButton();

}
                });

Imran_Ansari · Accepted Answer

Hi,here is the complete code that you need to put in JS editor, refer last three lines of code to hide the buttons.Qualtrics.SurveyEngine.addOnload(function(){/*Place your JavaScript here to run when the page loads*/ this.hidePreviousButton();            var that = this;            Event.observe(document, 'keydown', function keydownCallback(e) {              var choiceID = null;              switch (e.keyCode) {                case 80: // 'p' was pressed                  choiceID = 1;                  break;                case 78: // 'n' was pressed                  choiceID = 2;                  break;              }              if (choiceID) {                Event.stopObserving(document, 'keydown', keydownCallback);                that.setChoiceValue(choiceID, true);                that.clickNextButton();              }  });var v = document.getElementsByClassName('MultipleAnswer');for (i = 0; i < v.length; i++) {   v[i].style.visibility = "hidden";}});

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