Ignore validations on few fields according to another field

Question

I use jquery validation engine to validate following form.

Static <input type="radio" name="mode" value="Static" data-validation-engine="validate[required] radio" data-prompt-position="topRight:-70"/>

DHCP <input type="radio" name="mode" value="dhcp" data-validation-engine="validate[required] radio" data-prompt-position="topRight:-70"/>

IP <input type="text" name="ip" id="ip" data-validation-engine="validate[required,custom[ipv4]]" data-prompt-position="topRight:-70"/>

Gateway <input type="text" name="gateway" id="gateway" data-validation-engine="validate[required,custom[ipv4]]" data-prompt-position="topRight:-70"/>

DNS <input type="text" name="dns" id="dns" data-validation-engine="validate[required,custom[ipv4]]" data-prompt-position="topRight:-70"/>

Normally ip/gateway/dns validate as per the rules, but I need to ignore the ip/gateway/dns validation when dhcp mode selection. (validations needs only for static mode selection)

In jquery script I just initialize the validateEngine as below.

$("#my_form").validationEngine();

Any idea how I can archive this task.

Answer 1

called this function onchange event of radio button, if dpcp, state is true otherwise false

function state_change(state){
    if(state){
        $('#ip').removeAttr("data-validation-engine");
        $('#gateway').removeAttr("data-validation-engine");
        $('#dns').removeAttr("data-validation-engine");
    } else{
        $('#ip').attr("data-validation-engine","validate[required,custom[ipv4]]");
        $('#gateway').attr("data-validation-engine","validate[required,custom[ipv4]]");
        $('#dns').attr("data-validation-engine","validate[required,custom[ipv4]]");
    }
}