Next button count down

Challenge

In order to control when the next button should be available for the respondent

As a questionnaire creator

I want to hide Next button in specify time

Example

• I have a Text question like below.

Solution

• Add a Text grid question to Questionnaire editor
• This script only works in combination with the question property count down. The number you define in count down, is the number of seconds the next button will be unavaliable for the respondent.

• Go to menu Properties -> Question scripts -> Java script tab -> Input script

Code

function setVisibility(visible)
{
   if (!document.getElementsByName('next') || document.getElementsByName('next').length == 0)
      // next button not available
      return;
   if (visible)
      document.getElementsByName('next')[0].style.display = '';
   else
      document.getElementsByName('next')[0].style.display = 'none';
}
question.prototype.onInit = function()
{
   // set invisible onload
   setVisibility(false);
}
question.prototype.onCountdown = function()
{
   //this.next();
   if (this.countdown != null && this.countdown > 0)
   {
      this.countdown--;
      this.countDownObj.value--;
      this.countDownObj.render();
      if (this.countdown == 0)
      {
         // Disable the timed trigger
         window.clearInterval(this.countdownHandle);
         setVisibility(true);
      }
   }
}