Custom jQuery validation plugin

My boss asked me to program a custom jQuery validation plugin. If <input /> tag has special attribute [needcheck], my plugin must determine the type of [needcheck] and check input data before submit.

For example:

<input name="email" type="text" needchek=”Email”/>

If value of <input /> tag has errors, plugin must show a promting message.

Available types for [needcheck]:

• Date:[FORMATDATE] – date in format (For example Date:dd.MM.yyyy)
• Time:[TIMEFORMAT] – time in format (for example Time:HH:MM:SS)
• INT – integer number
• Decimal:[DECIMALFORMAT] – Decimal number
• Email – email address
• Etc.

The code:

(function($) { 
    $.fn.somePlugin = function(options) { 
        var defaults = { 
            someOption: 'someValue'
        }; 
        var opts = $.extend(defaults, options); 
    };   
})(jQuery);