Phiên bản đầy đủ: jsB@nk » Email » Kiểm tra Email
URL: https://www.javascriptbank.com/validate-e-mail.html
Hiệu ứng sẽ kiểm tra xem chuỗi do người dùng nhập vào có đúng là một dạng thư điện tử hợp lệ không.
Phiên bản đầy đủ: jsB@nk » Email » Kiểm tra Email
URL: https://www.javascriptbank.com/validate-e-mail.html
<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 [email protected] 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--><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-->