Validação de data

validate-date.js

function validateDate(data){
var p         = data.split("/"),
    isNumber  = /^\d{1,2}\/\d{1,2}\/\d{4}$/,
    date      = new Date(+p[2], +p[1] -1 , +p[0]); // dd/mm/yyy
return isNumber.test(data) && !(date.getDate() !== +p[0] || date.getMonth() !== (+p[1] - 1) || date.getFullYear() !== +p[2]);
};