ZIP code validation using javascript

Author: Amit Mehra Company URL: http://www.dotnetspark.com
Posted Date: February 16, 2009 Points: 5

Hi
you can use below function to check the valid zip code using javascript.


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;
}

http://javascript.internet.com/forms/val-zip-code.html

Thanks,
Amit
Please "Mark As Answer " if this post help you.

Author: Nabin Company URL: http://www.sakshiinfoway.com
Posted Date: August 27, 2009 Points: 5

=============================================
insert that script in<head></head>
=============================================

<SCRIPT LANGUAGE="JavaScript">
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 that part inside <body> where u want to use that script function
=========================================================================

<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>

ZIP code validation using javascript

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