index.html
                    
<!doctype html>
<html ng-app="plunker">
<head>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.0.5/angular.js"></script>
<script src="http://angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.4.0.js"></script>
<script src="example.js"></script>
<link href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.min.css" rel="stylesheet">
</head>
<body>
<form onsubmit="console.log(document.forms[0].test.value)">
<div ng-controller="CollapseDemoCtrl">
<input name="test" ng-model="test" id="test">
<input type="submit">
</form>
</div>
</body>
</html>
                    example.js
                    
angular.module('plunker', ['ui.bootstrap']);
function CollapseDemoCtrl($scope) {
$scope.isCollapsed = false;
$scope.test = "sdf<h1>sdf";
$scope.cl = function () { alert(document.getElementById('test').innerHTML );}
}