"Swap" Function

<SCRIPT>

str = prompt("Please Enter your Name (First Last):", "Frank Peter");

if (str == "" || str == null) str = "Frank Peter";

str = str.replace(/(\w+)\s(\w+)/, "$2, $1");  // "swap" the 1st word and the 2nd word

alert(str);

document.write(str);

</SCRIPT>