How is use of jQuery plugin validation to CodeIgniter?

[eluser]SaSa[/eluser]
not work
my form:

Code:

<br>&lt;input type ='text' name='title' maxlength='50' class="required" id = "contactform" /&gt;&lt;/br>
    <br>&lt;input type ='text' name='ural' maxlength='50' class="required defaultInvalid url" id = "contactform" dir ="ltr" /&gt;&lt;/br>
    <br>&lt;input type ='text' name='page_linkus' maxlength='50' class="required defaultInvalid url" id = "contactform" dir ="ltr" /&gt;&lt;/br>
    <br>&lt;input type ='text' name='exposition' maxlength='50' class="required" id = "contactform" /&gt;&lt;/br>
    <br>&lt;input type="submit" value="Submit" /&gt;&lt;/li>

what is the address you are using this code?