UnCaught Reference Error:Qualtrics not Found

Hi,

I am in an requirement to add the javascript code into an existing website code which basically functions to capture the embedded data such as CAID and Email ID which I have configured these fields in the survey flow of the particular survey and also in the website intercept embedded data by choosing the type as the Value from Javascript in order to store the values for the particular embedded data field from the javascript code . 

The javascript code which I have incorported in the existing website code 
 

  <script>

Qualtrics.SurveyEngine.addOnLoad(function()

{

Qualtrics.SurveyEngine.addOnPageSubmit(function(type)

{

if(type == "next")

{

            var EmailID = "xxx@xxx.com";

        var CAID = 935326;

            Qualtrics.SurveyEngine.setEmbeddedData('EmailID', EmailID);

Qualtrics.SurveyEngine.setEmbeddedData('CAID', CAID);

    }

});

});

    </script>

and also I have placed the website intercept deployment code at the header section 
I am getting the “Uncaught ReferenceError ReferenceError: Qualtrics is not defined” error can anyone suggest an solution to tackle this error 

Thanks in Advance 

Regards,

Harshitha R