Blank Field in Span Property

I’m working in Acrobat DC

I’m creating a business card template. The fields are EmpName, Title, PhysicalAdd, Telephone, FAX, and EmailAdd.

My dilemma is with EmailAdd. The employee can choose to have their email address on the card or not. Below in span 5 you will see that I have added the
@HSa.co.merced.ca.us to the span. All the worker does is enter the first part of their email in the EmailAdd field. If the employee leaves the EmailAdd field
blank/empty, @HSa.co.merced.ca.us will still print on the card. How can I accommodate for an blank/empty EmailAdd field?

var spans = event.richValue;

spans[0] = new Object();

spans[0].text =
this.getField("EmpName").valueAsString + "\r";

spans[0].fontWeight = 700;

spans[0].textSize = 9;

spans[1] = new Object();

spans[1].text = this.getField("Title").valueAsString + "\r \r";

spans[1].fontWeight = 700;

spans[1].fontStyle ="italic";

spans[2]= new Object();

spans[2].text = this.getField("PhysicalAdd").valueAsString + "\r \r";

spans[3] = new Object();

spans[3].text = this.getField("Telephone").valueAsString + ", Ext. " + this.getField("Extension").valueAsString + "\r";

spans[4] = new Object();

spans[4].text = this.getField("FAX").valueAsString + "\r";

spans[5] = new Object();

spans[5].text = this.getField("EmailAdd").valueAsString + "@hsa.co.merced.ca.us";

event.richValue = spans;

Thank you