View source for Validate the questions by using the questioncheck() function

= Validate the questions of questionnaire by using the questioncheck() function =

*The Javascript function questioncheck() is where all the question validation stuff will be implemented. Therefore, to implement your own question validation stuff which not supported by the Catglobe system, you need to '''overwrite''' this function.
*The questioncheck() function will be called/invoked by the '''quest.next()''' function when the '''Next''' button is clicked.
*It is '''required''' that the questioncheck() function must return the '''boolean''' values (true/false). If true, the answer value of question is valid, else the answers value of question is invalid.
*To display '''error messages''' when the answer of question is invalid. You could use the Javascript '''alert()''' function or add your error message texts to the container which has the id: '''#errorMessages'''
*In most cases, you should '''copy''' the questioncheck() before overwriting it by your own questioncheck function. To copy the questioncheck and overwrite it, please see below snippnet:

<br/><source lang="javascript">
var old_questioncheck = questioncheck(); // This line copy the questioncheck()
questioncheck = function() { // This line overwrite the questioncheck() by your own questioncheck

 if(!old_questioncheck()) // In most cases, we will reuse the old questioncheck to implement the validation rules that supported by Catglobe system
 return false;
 
 // If the old questioncheck detects that the answer of question is valid with its own rules, then we will continue with our validation rules.
 // Implement your own validation rules below
 // Your own validation rule coldes here.....numeric validation codes...
 
 // Remember that it is required the this function must return the boolean values (true/false) 
};
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