jQuery validace formuláře s poli

<td><div><input type='text' name='obal2[$i][poc]' size='2' value=''></div></td> 

//modified code
checkForm: function() {
    this.prepareForm();
    for ( var i = 0, elements = (this.currentElements = this.elements()); elements[i]; i++ ) {
        if (this.findByName( elements[i].name ).length != undefined && this.findByName( elements[i].name ).length > 1) {
            for (var cnt = 0; cnt < this.findByName( elements[i].name ).length; cnt++) {
                    this.check( this.findByName( elements[i].name )[cnt] );
            }
        } else {
            this.check( elements[i] );
        }
    }
    return this.valid();
},


//original code
/*checkForm: function() {
			this.prepareForm();
			for ( var i = 0, elements = (this.currentElements = this.elements()); elements[i]; i++ ) {
				this.check( elements[i] );
			}
			return this.valid(); 
		},
*/

<script language="javascript">
$().ready(function() {
    // validate the comment form when it is submitted
    $("#signupForm").validate({
       
        rules: {
            "example[]": "required"
        },
        messages: {
            "example[]": "Fill it!",
        }
    });
});
</script>