AngularJS UI-Bootstrap Modal Dialog gets covered by main.html - angularjs

Question

How can I use bootstrap modal dialogs with AngularJS using ui-bootstrap with angular-ui-router? I am new to AngularJS and tried searching the documentation without luck.
I have used this code but the contents behind gets covered:
my main.html :
<form class="navbar-form">
<div class="input-group">
<input type="text" class="form-control" placeholder="Search...">
<span class="input-group-btn">
<button type="submit" class="btn btn-default">
<img src="img/dsd.png" style="width: 17px">
</button>
</span>
</div>
<a class="btn btn-success" ui-sref="app.login">Login</a>
<a class="btn btn-danger" ui-sref="app.register">Regiter</a>
</form>
my app.js:
angular.module("myApp",["ngAnimate","ngSanitize","ui.router","ui.bootstrap","mds"])
.config(function ($stateProvider,$urlRouterProvider) {
$stateProvider
.state("app",{
url:"/app",
views:{
main:{
templateUrl:"templates/main.html",
controller:"appCtrl"
}
}
})
.state("app.register",{
url:"/register",
views:{
sub:{
templateUrl:"templates/register.html",
controller:"registerCtrl"
}
}
})
my modal:
<div id="y" class="modal-dialog">
<div>
<div class="modal-content">
<div class="modal-header btn-danger">
x
SignUp
</div>
<div class="modal-body">
<form ng-submit="register()">
<div class="form-group">
<label>Full Name</label>
<input type="text" class="form-control" ng-model="Name" required>
</div>
<div class="form-group">
<label>User Name</label>
<input type="text" class="form-control" ng-model="UserName" required>
</div>
<div class="form-group">
<label>Phone Number</label>
<input type="tel" class="form-control" ng-model="Phone" required>
</div>
<div class="form-group">
<label>Full Address</label>
<textarea class="form-control" ng-model="addr" required></textarea>
</div>
<div class="form-group">
<label>Email address:</label>
<input type="email" class="form-control" ng-model="Email" required>
</div>
<div class="form-group">
<label>Password:</label>
<input type="password" class="form-control" ng-model="Pwd" required>
</div>
<div class="checkbox">
<label><input type="checkbox"> Remember me</label>
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
</div>
<div class="modal-footer">
Sudan Store.
</div>
</div>
</div>
</div>

Answer 1

One approach is to use the appendTo option:
From the Docs:
$uibModal's open function
options parameter
appendTo (Type: angular.element, Default: body: Example: $document.find('aside').eq(0)) - Appends the modal to a specific element.
Use the appendTo option to append to an element that will be fully visible.
For more information, see
UI-Bootstap modal Directive API Reference