JS RegExp from variable -- From http://stackoverflow.com/questions/494035/how-do-you-pass-a-variable-to-a-regular-expression-javascript

regex.js

var re = new RegExp("regex","g");
// or
new RegExp(someObj.path).test(url)
// also
// this.appConfig.appPath.photo = 'photo/'
var re = new RegExp(this.appConfig.appPath.photo+'+.');