thing.js

var strToCheck = "here's some stuff and also squirrels 23 and other things";
var strToMatch = "squirrels";
// the double backslash prevents the backslash from being escaped by the RegExp constructor
// ... whee!
var regex = new RegExp(strToMatch + "\\s[0-9]{1,2}", "g");

var match = regex.exec(strToCheck);

// the result is that match now contains
// ["squirrels 23", index: 11, input: "some stuff squirrels 23 and things", groups: undefined]