Date Validation using Angularjs.

I am newbee to angularjs, don't know exactly how to write the Angularjs code. But need some help regard date validation on html5 form.

I have two dates actually.

1. Product Purchase Date

2. Product Warranty End Date

When a user selects "Product Purchase Date", then the field of "Product Warranty End Date" which is min=""(css3) to be set with "Product Purchase Date".

Need some code for this if someone could help me here.

assign ng-model of product purchase date to product warranty date

eg:

<input type="text" ng-model="purchaseDate">

<input type="text" ng-bind="purchaseDate">

hope fully this will help you

Here is my code please see it and let me know how to set only min attribute to Product Purchase Date.

<label for="PPurDate">Printer Purchase Date<span class="mycolon">:</span> </label>

<input type="date"  name="PPurDate" id="PPurDate"  /> <br><br>

<label for="Wend">Warranty End Date<span class="mycolon">:</span></label>

<input type="date" min="?" name="Wend" id="Wend" /><br><br />

Because what I want is that when a user selects "Printer Purchase Date" as 23-01-2014 then "min" attribute for Warranty End Date should be set as selected "Printer Purchase Date". Because you can't have Warranty End Date lesser than "Printer Purchase Date".