var dateRE = /^(\d{2})[\/\- ](\d{2})[\/\- ](\d{4})/;

function dmyOrdA(a, b){
a = a.replace(dateRE,"$3$2$1");
b = b.replace(dateRE,"$3$2$1");
if (a>b) return 1;
if (a <b) return -1;
return 0; }

function dmyOrdD(a, b){
a = a.replace(dateRE,"$3$2$1");
b = b.replace(dateRE,"$3$2$1");
if (a>b) return -1;
if (a <b) return 1;
return 0; }

function mdyOrdA(a, b){
a = a.replace(dateRE,",$3$1$2");
b = b.replace(dateRE,",$3$1$2");
if (a>b) return 1;
if (a <b) return -1;
return 0; }

function mdyOrdD(a, b){
a = a.replace(dateRE,"$3$1$2");
b = b.replace(dateRE,"$3$1$2");
if (a>b) return -1;
if (a <b) return 1;
return 0; }