How to check if a string is a legal “dd/mm/yyyy” date?

Question

Given a string str, how could I check if it is in the dd/mm/yyyy format and contains a legal date ?

Some examples:

bla bla          


        

Answer 1

you can use regular exp to validate date . try like this :

  re = /^\d{1,2}\/\d{1,2}\/\d{4}$/; 
if(form.mydate.value != '' && !form.mydate.value.match(re))
  //do something here

note: this will only work for dd/mm/yyyy

for exact match of your requirement use

 re = /^\d{2}\/\d{2}\/\d{4}$/;