If an email address is valid.
It checks for a lot of things: to see if the email contains a "@" sign and a dot, checks to see if the @ is before the dot, and so on.

<script>
function isMail(str)
{
var at="@";
var dot=".";
var lat=str.indexOf(at);
var lstr=str.length;
var ldot=str.indexOf(dot);
if (str.indexOf(at)==-1) return false;
if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr) return false;
if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr) return false;
if (str.indexOf(at,(lat+1))!=-1) return false; if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==do t) return false;
if (str.indexOf(dot,(lat+2))==-1) return false;
if (str.indexOf(" ")!=-1) return false;
return true;
}

// the next function will be used to validate the form. I made this as a separate function because you might want to validate more fields.
function validate_form()
{
if (!isMail(document.form1.mail.v alue))
{
alert("Please enter a valid email address");
document.form1.mai l.focus();
return false;
}
// if the value entered is not a valid email address,
// we show a message, focus on the field and return false.
// returning false will make sure the form is not submitted

// if we got here, it means the email address is valid
return true;
// return true means that the form is submitted.
}
</script>

Af ter placing this function in the code, here is what you need to put in the form.

Let's say the form only has the email address and a submit button.

<form action="/" method="post" onsubmit="return validate_form()" name="form1">
<input type="text" name="email" value="">
<input type="submit" name="submit_button" value="continue">
</form>

Answered by Yash , an ibibo Master, at 10:14 AM on July 03, 2008

If an email address is valid.
It checks for a lot of things: to see if the email contains a "@" sign and a dot, checks to see if the @ is before the dot, and so on.

<script>
function isMail(str)
{
var at="@";
var dot=".";
var lat=str.indexOf(at);
var lstr=str.length;
var ldot=str.indexOf(dot);
if (str.indexOf(at)==-1) return false;
if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr) return false;
if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr) return false;
if (str.indexOf(at,(lat+1))!=-1) return false; if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==do t) return false;
if (str.indexOf(dot,(lat+2))==-1) return false;
if (str.indexOf(" ")!=-1) return false;
return true;
}

// the next function will be used to validate the form. I made this as a separate function because you might want to validate more fields.
function validate_form()
{
if (!isMail(document.form1.mail.v alue))
{
alert("Please enter a valid email address");
document.form1.mai l.focus();
return false;
}
// if the value entered is not a valid email address,
// we show a message, focus on the field and return false.
// returning false will make sure the form is not submitted

// if we got here, it means the email address is valid
return true;
// return true means that the form is submitted.
}
</script>

Af ter placing this function in the code, here is what you need to put in the form.

Let's say the form only has the email address and a submit button.

<form action="/" method="post" onsubmit="return validate_form()" name="form1">
<input type="text" name="email" value="">
<input type="submit" name="submit_button" value="continue">
</form>

Answered by Shobhit , an ibibo Master, at 6:04 PM on June 25, 2008

If an email address is valid.
It checks for a lot of things: to see if the email contains a "@" sign and a dot, checks to see if the @ is before the dot, and so on.

<script>
function isMail(str)
{
var at="@";
var dot=".";
var lat=str.indexOf(at);
var lstr=str.length;
var ldot=str.indexOf(dot);
if (str.indexOf(at)==-1) return false;
if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr) return false;
if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr) return false;
if (str.indexOf(at,(lat+1))!=-1) return false; if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==do t) return false;
if (str.indexOf(dot,(lat+2))==-1) return false;
if (str.indexOf(" ")!=-1) return false;
return true;
}

// the next function will be used to validate the form. I made this as a separate function because you might want to validate more fields.
function validate_form()
{
if (!isMail(document.form1.mail.v alue))
{
alert("Please enter a valid email address");
document.form1.mai l.focus();
return false;
}
// if the value entered is not a valid email address,
// we show a message, focus on the field and return false.
// returning false will make sure the form is not submitted

// if we got here, it means the email address is valid
return true;
// return true means that the form is submitted.
}
</script>

Af ter placing this function in the code, here is what you need to put in the form.

Let's say the form only has the email address and a submit button.

<form action="/" method="post" onsubmit="return validate_form()" name="form1">
<input type="text" name="email" value="">
<input type="submit" name="submit_button" value="continue">
</form>

Answered by Madhurima , an ibibo Master, at 1:40 PM on June 13, 2008

Hi there

If an email address is valid.
It checks for a lot of things: to see if the email contains a "@" sign and a dot, checks to see if the @ is before the dot, and so on.

<script>
function isMail(str)
{
var at="@";
var dot=".";
var lat=str.indexOf(at);
var lstr=str.length;
var ldot=str.indexOf(dot);
if (str.indexOf(at)==-1) return false;
if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr) return false;
if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr) return false;
if (str.indexOf(at,(lat+1))!=-1) return false; if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==do t) return false;
if (str.indexOf(dot,(lat+2))==-1) return false;
if (str.indexOf(" ")!=-1) return false;
return true;
}

// the next function will be used to validate the form. I made this as a separate function because you might want to validate more fields.
function validate_form()
{
if (!isMail(document.form1.mail.v alue))
{
alert("Please enter a valid email address");
document.form1.mai l.focus();
return false;
}
// if the value entered is not a valid email address,
// we show a message, focus on the field and return false.
// returning false will make sure the form is not submitted

// if we got here, it means the email address is valid
return true;
// return true means that the form is submitted.
}
</script>

Af ter placing this function in the code, here is what you need to put in the form.

Let's say the form only has the email address and a submit button.

<form action="/" method="post" onsubmit="return validate_form()" name="form1">
<input type="text" name="email" value="">
<input type="submit" name="submit_button" value="continue">
</form>

Answered by Reeta K , an ibibo Master, at 1:05 PM on June 09, 2008

well marven, If an email address is valid.
It checks for a lot of things: to see if the email contains a "@" sign and a dot, checks to see if the @ is before the dot, and so on.

<script>
function isMail(str)
{
var at="@";
var dot=".";
var lat=str.indexOf(at);
var lstr=str.length;
var ldot=str.indexOf(dot);
if (str.indexOf(at)==-1) return false;
if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr) return false;
if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr) return false;
if (str.indexOf(at,(lat+1))!=-1) return false; if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==do t) return false;
if (str.indexOf(dot,(lat+2))==-1) return false;
if (str.indexOf(" ")!=-1) return false;
return true;
}

// the next function will be used to validate the form. I made this as a separate function because you might want to validate more fields.
function validate_form()
{
if (!isMail(document.form1.mail.v alue))
{
alert("Please enter a valid email address");
document.form1.mai l.focus();
return false;
}
// if the value entered is not a valid email address,
// we show a message, focus on the field and return false.
// returning false will make sure the form is not submitted

// if we got here, it means the email address is valid
return true;
// return true means that the form is submitted.
}
</script>

Af ter placing this function in the code, here is what you need to put in the form.

Let's say the form only has the email address and a submit button.

<form action="/" method="post" onsubmit="return validate_form()" name="form1">
<input type="text" name="email" value="">
<input type="submit" name="submit_button" value="continue">
</form>

Answered by satyaiitk , an ibibo Master, at 11:41 AM on June 07, 2008

well marven, In forms when using email ID fields it is a good idea to use client side validation along with your programming language validation. The following example shows how you can validate an email address for a form. The script is cross browser compatibe (works for all browsers).

<script language = "Javascript">
/**
* DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dht ml/)
*/

function echeck(str) {

var at="@"
var dot="."
var lat=str.indexOf(at)
var lstr=str.length
var ldot=str.indexOf(dot)
if (str.indexOf(at)==-1){
alert( "Invalid E-mail ID")
return false
}

if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
alert ("Invalid E-mail ID")
return false
}

if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
aler t("Invalid E-mail ID")
return false
}

if (str.indexOf(at,(lat+1))!=-1){
alert("Invalid E-mail ID")
return false
}

if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==do t){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(dot,(lat+2))==-1) {
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(" ")!=-1){
alert("Invalid E-mail ID")
return false
}

return true
}

function ValidateForm(){
var emailID=document.frmSample.txt Email

if ((emailID.value==null)||(email ID.value=="")){
alert("Plea se Enter your Email ID")
emailID.focus()
ret urn false
}
if (echeck(emailID.value)==false) {
emailID.value=""
email ID.focus()
return false
}
return true
}
</script>

Answered by Radhe Radhe , an ibibo Advisor, at 6:41 PM on June 06, 2008

well marven, In forms when using email ID fields it is a good idea to use client side validation along with your programming language validation. The following example shows how you can validate an email address for a form. The script is cross browser compatibe (works for all browsers).

<script language = "Javascript">
/**
* DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dht ml/)
*/

function echeck(str) {

var at="@"
var dot="."
var lat=str.indexOf(at)
var lstr=str.length
var ldot=str.indexOf(dot)
if (str.indexOf(at)==-1){
alert( "Invalid E-mail ID")
return false
}

if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
alert ("Invalid E-mail ID")
return false
}

if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
aler t("Invalid E-mail ID")
return false
}

if (str.indexOf(at,(lat+1))!=-1){
alert("Invalid E-mail ID")
return false
}

if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==do t){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(dot,(lat+2))==-1) {
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(" ")!=-1){
alert("Invalid E-mail ID")
return false
}

return true
}

function ValidateForm(){
var emailID=document.frmSample.txt Email

if ((emailID.value==null)||(email ID.value=="")){
alert("Plea se Enter your Email ID")
emailID.focus()
ret urn false
}
if (echeck(emailID.value)==false) {
emailID.value=""
email ID.focus()
return false
}
return true
}
</script>

The JavaScript has two functions:

* Function echeck is used to verify if the given value is a possible valid email address. This function thus simply makes sure the email address has one (@), atleast one (.). It also makes sure that there are no spaces, extra '@'s or a (.) just before or after the @. It also makes sure that there is atleast one (.) after the @.

* Function ValidateForm is used to make sure that the email field is not blank and that it is a valid email address on form submission.

Answered by Romi , an ibibo Master, at 6:37 PM on June 06, 2008

In forms when using email ID fields it is a good idea to use client side validation along with your programming language validation. The following example shows how you can validate an email address for a form.

<script language = "Javascript">
/**
* DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dht ml/)
*/

function echeck(str) {

var at="@"
var dot="."
var lat=str.indexOf(at)
var lstr=str.length
var ldot=str.indexOf(dot)
if (str.indexOf(at)==-1){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(at,(lat+1))!=-1){
alert("Invalid E-mail ID")
return false
}

if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==do t){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(dot,(lat+2))==-1) {
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(" ")!=-1){
alert("Invalid E-mail ID")
return false
}

return true
}

function ValidateForm(){
var emailID=document.frmSample.txt Email

if ((emailID.value==null)||(email ID.value=="")){
alert("Plea se Enter your Email ID")
emailID.focus()
ret urn false
}
if (echeck(emailID.value)==false) {
emailID.value=""
email ID.focus()
return false
}
return true
}
</script>


<form name="frmSample" method="post" action="#" onSubmit="return ValidateForm()">
<p>Enter an Email Address :
<input type="text" name="txtEmail">
</p>
<p>
<input type="submit" name="Submit" value="Submit">
</p>
</form>

The JavaScript has two functions:

* Function echeck is used to verify if the given value is a possible valid email address. This function thus simply makes sure the email address has one (@), atleast one (.). It also makes sure that there are no spaces, extra '@'s or a (.) just before or after the @. It also makes sure that there is atleast one (.) after the @.

* Function ValidateForm is used to make sure that the email field is not blank and that it is a valid email address on form submission.

Answered by Om Prakash , an ibibo Master, at 6:03 PM on June 06, 2008

well , I am feeling HAPPY to answer your question , I would like to suggest you to access the source site if it's available , for more information.

If an email address is valid.
It checks for a lot of things: to see if the email contains a "@" sign and a dot, checks to see if the @ is before the dot, and so on.

<script>
function isMail(str)
{
var at="@";
var dot=".";
var lat=str.indexOf(at);
var lstr=str.length;
var ldot=str.indexOf(dot);
if (str.indexOf(at)==-1) return false;
if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr) return false;
if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr) return false;
if (str.indexOf(at,(lat+1))!=-1) return false; if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==do t) return false;
if (str.indexOf(dot,(lat+2))==-1) return false;
if (str.indexOf(" ")!=-1) return false;
return true;
}

// the next function will be used to validate the form. I made this as a separate function because you might want to validate more fields.
function validate_form()
{
if (!isMail(document.form1.mail.v alue))
{
alert("Please enter a valid email address");
document.form1.mai l.focus();
return false;
}
// if the value entered is not a valid email address,
// we show a message, focus on the field and return false.
// returning false will make sure the form is not submitted

// if we got here, it means the email address is valid
return true;
// return true means that the form is submitted.
}
</script>

Af ter placing this function in the code, here is what you need to put in the form.

Let's say the form only has the email address and a submit button.

<form action="/" method="post" onsubmit="return validate_form()" name="form1">
<input type="text" name="email" value="">
<input type="submit" name="submit_button" value="continue">
</form>

For more information , please do visit source site:


Hope it will help you out.

Answered by Uttam , an ibibo Master, at 2:12 PM on June 06, 2008

The JavaScript has two functions:

1) Function echeck is used to verify if the given value is a possible valid email address. This function thus simply makes sure the email address has one (@), atleast one (.). It also makes sure that there are no spaces, extra '@'s or a (.) just before or after the @. It also makes sure that there is atleast one (.) after the @.

2) Function ValidateForm is used to make sure that the email field is not blank and that it is a valid email address on form submission.

if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==do t){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(dot,(lat+2))==-1) {
alert("Invalid E-mail ID")
return false
}

Answered by Sharad Singh , an ibibo Master, at 1:38 PM on June 06, 2008