CAPTCHA is designed to recognize the difference between a bot and human and sometimes even malicious software to provide the security to your web system. You have seen Captcha at the time of signup, putting comments on any site, contact forms etc. Here are 10 jQuery Captcha plugin that helps you protect your web pages from bots and spammers
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Alajax is tiny jquery plugin that use for convert HTML forms into AJAX forms. This jQuery plugin will converts standard forms into Ajaxed ones, easy and no coding required. Alajax can work with dynamic forms (forms that is updated by Javascript) and Easy to understand and to modify. It is perfect resources for developers, designers and website ownsers. Alajax created