From Overview of JavaScript I -- Basic Web Scripting Language CPS616 Technologies of the Information Age -- Spring Semester 99. byGeoffrey C. Fox (Tom Scavo)
A do...while loop tests its condition at the bottom of the loop: do { statements } while ( condition );
In this case, the statements in the loop body are guaranteed to execute at least once
This loop is new in JavaScript 1.2 and JScript 3.0