Password validation in angular js

<pre>
		<div class="form-group" ng-class="{ 'has-error' : registrationForm.pwd.$invalid && !registrationForm.pwd.$pristine}">
		<label for="pwd">Password:</label>
		<input type="password" class="form-control" id="pwd" name="pwd"  placeholder="Enter Password" ng-model="userdetails.pwd" required />
		<span style = "color:red" ng-show = "registrationForm.pwd.$dirty && registrationForm.pwd.$invalid"> 
		<span ng-show = "registrationForm.pwd.$error.required">Password is required.</span>  
		</span>	
		</div>
		
		<div class="form-group" ng-class="{ 'has-error' : registrationForm.conpwd.$invalid && !registrationForm.conpwd.$pristine}">
		<label for="pwd">Confirm Password:</label>
		<input type="password" class="form-control" id="conpwd" name="conpwd"  placeholder="Enter Confirm Password" ng-model="userdetails.conpwd" ng-match="userdetails.pwd" required />
		<span style = "color:red" ng-show = "registrationForm.conpwd.$dirty && registrationForm.conpwd.$invalid"> 
		<span ng-show = "registrationForm.conpwd.$error.required">Password is required.</span>  
<span ng-show = "registrationForm.conpwd.$error.match">Password do not match..</span> 
		</span>	
		</div>