Script for making a text grid numerical summing to a specific value

Challenge

In order to validate the inputs of a text grid question
As a questionnaire creator
I want to check if the sum of all values equals to a specific value

Solution

• Create a text-grid question, accept the numberical for sub question
• Add the below script to that question

Code

var expectedTotal = 100;
function specialQuestionCheck()
{
   var msg = "";
   var val = 0;
   for(i = 0; i < quest.questions.length; i++)
   {
      var tmpVal = document["query"][quest.questions[i].label].value;
      if(tmpVal == "")
      {
         // NOPI
      }
      else if(isNaN(tmpVal))
      {
         msg += "- Angiv venligst et  tal\n";
      }
      else if (tmpVal<0 || tmpVal>100)
      {
         msg += "Værdier skal være fra 0 til 100";
      }
	  else
	  {
		val += parseFloat(tmpVal);
	  }
   }

   if(msg == "")
   {
      if(val == expectedTotal)
      {
         return true;
      }
      else
      {
         alert("Værdierne skal summe til "+ expectedTotal +" - nuværende sum: " + val);
         return false;
      }
   }
   else
   {
      alert("Følgende fejl opstod:\n"+msg);
      return false;
   }
   return false;
}

var defaultQuestionCheck = questioncheck;

function newGoNext()
{
   document["query"]["dir"].value = "next";
   if(defaultQuestionCheck())
      return specialQuestionCheck();
   else
      return false;
}

quest.next = newGoNext;

Source

Questionnaire Resource Id on cg.catglobe.com site: 164079 (Question: Q11_Script_for_making_a_text_grid_numerical_summin)