Need Date Format in Dynamic Text as dd/mm/yyyy

Dear All,

Can anyone tell why in Dynamic text(using below javascript) i am not getting date format as dd/mm/yyyy where in all places i have formatted the field as dd/mm/yyyy

Even i tried both syntax:
"Payment Date between " + row["CB_DATE_FROM"] + " to " + row["CB_DATE_TO"]
"Payment Date between " + params["P_DATE_FROM"].value + " to " +params["P_DATE_TO"].value


OUTPUT COMING:
Payment Date between 2010-01-01 to 2013-01-01

where
REQUIRED OUTPUT:
Payment Date between 01/01/2010 to 01/01/2013


Regards,
Satinder kumar