Days of the week and inserting "&"

sample data attached.

There are either single days or multiple days that could be shown.

Single day would look like: MONDAY

Multiple days would look like: ex: TUESDAY & THURSDAY & SATURDAY

Based on the attached data file, how could I have it convert the "numbers" into days plus add "&" only when it has multiple days? Numbers are not always the same code.

Thanks!

test.txt

var DayNames = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];
var result = new Array();
for (var i = 0; i < 7; i++)
{
 if (Field(DayNames[i].substr(0, 2)))
   result.push(DayNames[i].toUpperCase());
}
return result.join(" & ");

Code from Dan

Wow, that worked!

Thanks!