Force number of characters: Difference between revisions

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Latest revision as of 09:55, 12 January 2012

Force number of characters

In order to force the respondent to write a certain number of characters in a text sub question.

As a questionnaire creator

I want to force the respondent to write a zip code, or a phone number in a certain text field.

Example

Solution

Add a Text grid question to Questionnaire editor like below
Go to menu Properties -> Question scripts -> Java script tab -> Input script

Code

var normalQuestionCheck = questioncheck;
function extendedQuestionCheck()
{
   var valid = normalQuestionCheck();
   if (valid)
   {
      // var_a hold the respondents answer.
      var var_a;
      // This is where the index of your sub question is defines.
      // The code below is that we use sub question has index 0 
      var_a = document["query"][quest.label + "." + 0].value;
      if (var_a.length > 0)
      {
         if (var_a.length != 10)
         {
            alert('The field can only hold 10 characters.');
            return false;
         }
      }
   }
   if (!valid)
   {
      alert('Please correct your answer.');
      return false;
   }
   return true;
}
questioncheck = extendedQuestionCheck;

Source

Questionnaire Resource Id on cg site: 159730

@@ Line 1: / Line 1: @@
-== Challenge ==
+== Force number of characters ==
-You want to use automatically change question, but don't want to show the counter for the respondent. The Next button is often hided when this script is used.
-== Script ==
+In order to force the respondent to write a certain number of characters in a text sub question.
-<source lang="javascript" line="1">
-function jumpon()
+As a questionnaire creator
-{
-       document["query"]["dir"].value = "next";
+I want to force the respondent to write a zip code, or a phone number in a certain text field.
-       document["query"].submit();
+'''Example'''
+[[Image:ValidateTextLength.JPG]]
+=== Solution ===
+*Add a Text grid question to Questionnaire editor like below
+*Go to menu Properties -> Question scripts -> Java script tab -> Input script
+[[Image:ForceNoOfCharacter Code.jpg]]
+=== Code ===
+<source lang="javascript">
+var normalQuestionCheck = questioncheck;
+function extendedQuestionCheck()
+{
+   var valid = normalQuestionCheck();
+   if (valid)
+   {
+      // var_a hold the respondents answer.
+      var var_a;
+      // This is where the index of your sub question is defines.
+      // The code below is that we use sub question has index 0
+       var_a = document["query"][quest.label + "." + 0].value;
+      if (var_a.length > 0)
+      {
+         if (var_a.length != 10)
+         {
+            alert('The field can only hold 10 characters.');
+            return false;
+         }
+      }
+   }
+   if (!valid)
+   {
+       alert('Please correct your answer.');
+      return false;
+   }
+   return true;
 }
-//defines how many milliseconds the question should be visible for the respondent
+questioncheck = extendedQuestionCheck;
-window.setTimeout("jumpon();", 1500);
 </source>
+=== Source ===
+Questionnaire Resource Id on cg site: 159730