Model Validation problem for mutiple button in mvc view(client side)

this my mvc model class:-
  [RequiredIf("chkLimits", true, ErrorMessage = "rLimitValue»Limit value is required.")]         [RegularExpression(@"^([0-9]*)$", ErrorMessage = "Limit value must be a number.")]         public short? Limits { get; set; }
this is my  mvc view buttons.
<a href="#" class="btn btn32 black32 fleft" onclick="return StudioCoversRequestsCreateGoal.OnbtnBackStepCreateGoalkClick(this)">Back</a>
<a href="#" class="btn btn32 blue32 fright" id="btnCancelCreateGoal" onclick="return StudioCoversRequestsCreateGoal.OnbtnCancelCreateGoalClick(this)">Cancel</a>
and this is my jquery function:-

OnbtnBackStepCreateGoalkClick: function (el) {   & ...