var topElements; var failed = false; function doScroll(d) { if (failed) return; for (var i = 0; i < topElements.length; ++i) { var e = topElements[i]; e.scrollTop = d; if (e.scrollTop != d) { document.documentElement.textContent = "Scrolling failed on " + e.tagName + " element, " + "tried to scroll to " + d + ", got " + e.scrollTop + " (Random number: " + Math.random() + ")"; failed = true; } } } // bug 1134459, images are decoded off main thread // Wait for the load event so we know all images have loaded document.onload = function() { topElements = document.getElementsByClassName("scrollTop"); if (!topElements.length) { topElements = [document.documentElement]; } if (document.location.search == '?ref') { doScroll(20); } else if (document.location.search == '?up') { doScroll(40); document.documentElement.setAttribute("class", "reftest-wait"); window.addEventListener("MozReftestInvalidate", function() { document.documentElement.removeAttribute("class"); doScroll(20); }, false); } else { doScroll(1); document.documentElement.setAttribute("class", "reftest-wait"); window.addEventListener("MozReftestInvalidate", function() { document.documentElement.removeAttribute("class"); doScroll(20); }, false); } }