<!DOCTYPE html>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
onload = function() {
    var c0 = document.querySelector('input');
    c0.style.display = 'none';
    c0.dispatchEvent(new MouseEvent('mousedown', { button: 1 }));
    document.body.innerHTML = 'PASS';
};
</script>
<input>