<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Test file</title>
    <style>
        body {
            margin: 0;
        }
        .block {
            height: 5000px;
        }
    </style>
    <script>
        window.test_result = 'test3_OK';
    </script>
</head>
<body>
    <a id="block1"></a>
    <div class="block"></div>

    <a id="block2"></a>
    <div class="block"></div>
</body>
</html>