In several questions we use the token attributes of the respondent in the question's javascript. For instance:

--javascript being passed to php
var tokenAttribute1 = {TOKEN:ATTRIBUTE_1};

--php script
$sql = "select * from foo WHERE attr='".$tokenAttribute1."'" ;

While testing these questions (lay-out etc) however, we would like some default value for the tokenAttribute1 without going through the survey each time we wish to see some changes. As the {TOKEN:ATTRIBUTE_1} is not set or defined when testing a single question, javascript throws a syntax error. I was wondering whether there is solution along the lines of this topic in the bugtracker: where a isset function is proposed. I think the expression manager passes an object or variable back after parsing the attribute, but I do not know how to evaluate this.

Psuedo code would be:

tokenAttribute1 = 0;
if(isset{TOKEN:ATTRIBUTE_1})
{
tokenAttribute1={TOKEN:ATTRIBUTE_1};
}

A similar test could be used in questions relying on answers from previous question - a bit like this topic

Thanks in advance!

The problem is that Expression Manager wraps the variable in several span elements if it is undefined. These span elements will cause JavaScript errors unless enclosed in quotes.

So try something like this to prevent those errors and detect the span elements:

Great, thanks, it works! The quotes indeed appear in the generated webpage. Instead of checking for the span, testing for the length works as well.

Cheers, Michael