/*
**************************************
* String.isDate Function v1.0        *
* Autor: Marlon Gripp Chermont       *
**************************************
*/

function isDate(f){
	var reDate = /^((0[1-9]|[12]\d)\/(0[1-9]|1[0-2])|30\/(0[13-9]|1[0-2])|31\/(0[13578]|1[02]))\/\d{4}$/;
	if(reDate.test(f.value))
		return true;
}