Javascript Array regex(expression)

/**/*w  ww. j a va 2s  .  com*/
@Name: Array.prototype.regex
@Author: Paul Visco
@Version: 1.1 11/19/07
@Description: Limit the values of an array to Values that do  not match the regex expression are excluded

@Return: Array Returns an array of values that match the regex from the original array
@Example:
var myArray = [5, 10, 15];
var answer = myArray.regex(/\d{2}/);
//answer = [10,15] //because they are at least two digits as specified in the regex \d{2}
*/
Array.prototype.regex = function(expression) {
 
 return this.filter(function(v, k, a) {
   if(v.toString().match(expression)){return true;}
 });
 
};