Weird Javascript Regex behavior

regex.js

#!/usr/bin/nodejs

//var regexRegex = /^\/([^\/]|(\\\/))*\/[gimy]*/;                                                                                       
var regexRegex = /^\/([^\/]|(\\\/))*\/[gimy]*/;
var regexRegexAsString = '^/([^\/]|(\\/))*/[gimy]*';

var notQuiteRegexRegex = /^"([^\/]|(\\"))*"[gimy]*/;

var notQuiteRegexSearchString = '"hello world\\" hows it going?"igmyi';
var regexSearchString = notQuiteRegexSearchString.replace(/"/g,'/');

console.log("Not quite regex (deliminated by \"):");
console.log(notQuiteRegexSearchString);
console.log(notQuiteRegexRegex.exec(notQuiteRegexSearchString)[0]);
console.log();

console.log("Real regex (deliminated by /):");
console.log(regexSearchString);
console.log(regexRegex.exec(regexSearchString)[0]);
console.log();

console.log("Real regex (deliminated by /):");
console.log(regexSearchString);
console.log(new RegExp(regexRegexAsString).exec(regexSearchString)[0]);