title: how to validate a picker to select date in a particular range
body: <p>I have these 2 controls:</p>
  
  <pre><code>&lt;div class="control-group"&gt;
                                  &lt;label class="control-label"&gt;Batch Date:&lt;/label&gt;
                                  &lt;div class="controls with-tooltip"&gt;
                                      &lt;asp:TextBox runat="server" CssClass="mydate input-small" ID="BatchDate_txt" /&gt;
                                  &lt;/div&gt;
                              &lt;/div&gt;
  
                              &lt;div class="control-group"&gt;
                                  &lt;label class="control-label"&gt;Claim Month:&lt;/label&gt;
                                  &lt;div class="controls with-tooltip"&gt;
                                      &lt;asp:TextBox runat="server" CssClass="mydatemonth input-small" ID="ClaimMonth_txt" /&gt;
                                  &lt;/div&gt;
                              &lt;/div&gt;
  </code></pre>
  
  <p>what i want to achieve is this: when you pick the batch date,the claim month should allow you to pick only within the next 90days from the claim month.
  Note: the claim month datepicker displays only month.</p>
  
  <p>I don't know if i was explicit enough but how do i go about this?</p>