| JavaScriptBank |
12-07-2009 08:30 PM |
Helpful JavaScripts to develop website
Good and Nice JavaScripts
Validate E-Mail
This JavaScript verifies that a string looks like a real e-mail address.... detail at JavaScriptBank.com - 2.000+ free JavaScript codes
How to setup
Step 1: Place JavaScript below in your HEAD section
JavaScript
Code:
<script language="javascript">
// Created by: Francis Cocharrua :: http://scripts.franciscocharrua.com/
function Validate_String(string, return_invalid_chars) {
valid_chars = '1234567890-_.^~abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
invalid_chars = '';
if(string == null || string == '')
return(true);
//For every character on the string.
for(index = 0; index < string.length; index++) {
char = string.substr(index, 1);
//Is it a valid character?
if(valid_chars.indexOf(char) == -1) {
//If not, is it already on the list of invalid characters?
if(invalid_chars.indexOf(char) == -1) {
//If it's not, add it.
if(invalid_chars == '')
invalid_chars += char;
else
invalid_chars += ', ' + char;
}
}
}
//If the string does not contain invalid characters, the function will return true.
//If it does, it will either return false or a list of the invalid characters used
//in the string, depending on the value of the second parameter.
if(return_invalid_chars == true && invalid_chars != '') {
last_comma = invalid_chars.lastIndexOf(',');
if(last_comma != -1)
invalid_chars = invalid_chars.substr(0, $last_comma) +
' and ' + invalid_chars.substr(last_comma + 1, invalid_chars.length);
return(invalid_chars);
}
else
return(invalid_chars == '');
}
function Validate_Email_Address(email_address){
// Modified and tested by Thai Cao Phong, JavaScriptBank.com
//Assumes that valid email addresses consist of user_name@domain.tld
at = email_address.indexOf('@');
dot = email_address.indexOf('.');
if(at == -1 ||
dot == -1 ||
dot <= at + 1 ||
dot == 0 ||
dot == email_address.length - 1)
{
alert("Invalid email");
return(false);
}
user_name = email_address.substr(0, at);
domain_name = email_address.substr(at + 1, email_address.length);
if(Validate_String(user_name) === false || Validate_String(domain_name) === false)
{
alert("Invalid email");
return(false);
}
alert("Valid email");//return(true);
}
</script>
<!--
This script downloaded from www.JavaScriptBank.com
Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
-->
Step 2: Copy & Paste HTML code below in your BODY section
HTML
Code:
<form name=f>
<input type=text name=mail value="">
<input type=button value=Check onclick="Validate_Email_Address(document.f.mail.value)">
</form>
<!--
This script downloaded from www.JavaScriptBank.com
Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
-->
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Quote:
Originally Posted by Copyright
The Site may provide, or third parties may provide, links to non-JavaScriptBank.com Internet World Wide Web sites or resources. Because JavaScriptBank.com has no control over such sites and resources, you acknowledge and agree that JavaScriptBank.com is not responsible for the availability of such external sites or resources, and does not endorse and is not responsible or liable for any content, advertising, products, or other materials on or available from such sites or resources. You further acknowledge and agree that JavaScriptBank.com shall not be responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with use of or reliance on any such content, goods or services available on or through any such site or resource.
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