<body>
<p>Test that you can't set a prefix for a node with null namespace.</p>
<p>Should say PASS:</p>
<pre id = log></pre>
<script>
if (window.testRunner)
    testRunner.dumpAsText();

function log(msg)
{
    document.getElementById("log").innerHTML += msg + "\n";
}

var a = document.createElement("a");
var attr = document.createAttribute("href");
attr.value = "#";

try {
    attr.prefix = "foo";
    log("FAIL: Was able to change the prefix.");
} catch (ex) {
    log("PASS");
}
    
a.setAttributeNode(attr);

// WebKit used to crash with an assertion here.
a.href;

</script>
</body>