/*@
Ox.escapeRegExp <f> Escapes a string for use in a regular expression
    (str) -> <r> Escaped string
    str <s> String
@*/
// see https://developer.mozilla.org/en/JavaScript/Guide/Regular_Expressions
Ox.escapeRegExp = function(str) {
    return (str + '').replace(/([\/\\^$*+?.-|(){}[\]])/g, '\\$1');
};