<apex:form Id="form" >

<input type="submit" value="submit" id="subBtn" name="subBtn" />
<apex:actionFunction name="doSubmit" action="{!submit}" />

</apex:form>

$("[id$=form]").validate({
             submitHandler: function(form) {
                doSubmit();
              }
        });

<apex:actionFunction name="doSubmit" action="{!submit}" oncomplete="return false;" />