Validation of US Zip Code

Posted by VIJI Friday, July 3, 2009

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.

/*This function accepts String as Parameter: Zip code to be validated */

/*This function returns True if valid other wise false */

function funcValidateUSZip( strValue ) {

var MyRegExp = /(^\d{5}$)|(^\d{5}-\d{4}$)/;

//check for valid US Zipcode
return MyRegExp.test(strValue);

funcValidateUSZip('44094') - returns true
funcValidateUSZip('99999-9999') returns true

funcValidateUSZip('4402') returns false
funcValidateUSZip('44094-999') returns false

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