<!DOCTYPE HTML>
<html>
    <head>
        <title> W3C DOM Level 3 Event Object method: stopPropagation </title>
        <script type="text/javascript">
            var PassTest = function()
            {
                document.getElementById("testresult").firstChild.data = "PASS";
            }

            var FailTest = function()
            {
                document.getElementById("testresult").firstChild.data = "FAIL";
            }

            var EVENT = "mousedown";
            var TARGET, PARENT;
            var ActualResult = [];
            var ExpectResult = [];

            window.onload = function()
            {
                try
                {
                    TARGET = document.getElementById("target");
                    PARENT = document.getElementById("parent");

                    ExpectResult = [document.body, PARENT];

                    TARGET.addEventListener(EVENT, TestEvent, true);
                    TARGET.addEventListener(EVENT, TestEvent, false);
                    PARENT.addEventListener(EVENT, TestEvent, true);
                    PARENT.addEventListener(EVENT, TestEvent, false);
                    document.body.addEventListener(EVENT, TestEvent, true);
                }
                catch(ex)
                {
                    FailTest();
                }
            }

            function TestEvent(evt)
            {
                ActualResult.push(evt.currentTarget);

                if (evt.currentTarget == PARENT)
                {
                    try
                    {
                        evt.stopPropagation();
                    }
                    catch(ex)
                    {
                    }
                }
            }

            function VerifyTest()
            {
                if (ActualResult.toString() == ExpectResult.toString())
                {
                    PassTest();
                }
                else
                {
                    FailTest();
                }
            }
        </script>
    </head>
    <body>
        <h4>
            Test Description:
            stopPropagation prevents other event listeners from being triggered.
        </h4>

        <div id="parent">
            Click the button: <input id="target" type="button" value="Target" onmouseup="VerifyTest()" />
        </div>

        <p>Test passes if the word "PASS" appears below after clicking the above button using mouse.</p>
           <div>Test result: </div>
        <div id='testresult'>FAIL</div>
    </body>
</html>