Validation (Zip Code) - JavaScript Made Easy: Free JavaScripts Tutorials Example Code

Metachecker.net

|

TrafficChecker.net

|

RankChecker.net

Learn Java Script Today

|

Over 5000 Free Fonts

|

|

Javascript Forum

|

Other Javascript Resources

|

JavaScript Basics

Inserting Javascript

Complete Tutorial

Advance DHTML Tutorial


Validation (Zip Code)

Ensure that your visitors enter a properly formatted 5 digit, or 5 digit+4 zip code. The visitor is alerted if any information is invalid and asked to try again. Cool! Zip:


Insert into <HEAD>
<SCRIPT LANGUAGE="JavaScript"> <!-- Original: Brian Swalwell (brian@swalwell.com) --> <!-- Begin function validateZIP(field) { var valid = "0123456789-"; var hyphencount = 0; if (field.length!=5 && field.length!=10) { alert("Please enter your 5 digit or 5 digit+4 zip code."); return false; } for (var i=0; i < field.length; i++) { temp = "" + field.substring(i, i+1); if (temp == "-") hyphencount++; if (valid.indexOf(temp) == "-1") { alert("Invalid characters in your zip code. Please try again."); return false; } if ((hyphencount > 1) \|\| ((field.length==10) && ""+field.charAt(5)!="-")) { alert("The hyphen character should be used with a properly formatted 5 digit+four zip code, like '12345-6789'. Please try again."); return false; } } return true; } // End --> </script>

Insert into <BODY>
<center> <form name=zip onSubmit="return validateZIP(this.zip.value)"> Zip: <input type=text size=30 name=zip> <input type=submit value="Submit"> </form> </center>

Other Options