</div>
        <div id="log"></div>
        <script>
        test(function(){assert_true(window.screen.width >= 0 && window.screen.width < 6000000);},
            "window.screen.width >= 0 && window.screen.width < 6000000");
        test(function(){assert_true(window.screen.height >= 0 && window.screen.height < 6000000);},
            "window.screen.height >= 0 && window.screen.height < 6000000");
        test(function(){assert_true(window.screen.availWidth >= 0 && window.screen.availWidth <= window.screen.