Removing Validation Attributes Conditionally?

i have a panel which iam showing as pop up with few textbox controls with several validation controls and button on clicking which i am checking for validation now i want to add a checkbox on checking it it should disable some of the controls and remove the validation properties from them and on unchecking it apply the same i am able to make those controls disabled but still on clicking that button it is asking for validating those controls

on the click event of checkbox i am calling one javascript function and applying the disabled attribute to some of the controls

function disableOtherElements(e)
{
var id = e.checked;
if (id)
{
$('.dd').attr('disabled', true);
}
else
{
$('.dd').removeAttr('disabled');
}
}

dd is the class assigned to all the controls that i want to be disabled. what i have to do to remove the validation properties