Hello Friends,
Here is a post for Zip code Validation

Zip code : Zip code should be atleast 3 & atmost 10 charcters only , should be alphanumeric & should accept dash(-).

Golden Regards,
Eluminous Support Team
eLuminous Technologies

The following Java Script validates the US Zip Code. It validates the US Zip Code which Should be in 5 digit Format or Zip + 4 Format.
function funcValidateUSZip( strValue ) {
var MyRegExp = /(^\d{5}$)|(^\d{5}-\d{4}$)/;
//check for valid US Zipcode
return MyRegExp.test(strValue);
}