pbroschwitz

/**
* supplant() does variable substitution on the string. It scans through the string looking for 
* expressions enclosed in { } braces. If an expression is found, use it as a key on the object, 
* and if the key has a string value or number value, it is substituted for the bracket expression 
* and it repeats.
*
* Written by Douglas Crockford
* http://www.crockford.com/
*/
String.prototype.supplant = function (o) {