diff -r 000000000000 -r 6474c204b198 layout/reftests/position-dynamic-changes/handleprop.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/reftests/position-dynamic-changes/handleprop.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+// Add the correct border/margin/padding style
+if (window.location.search.length > 0) {
+  var params = window.location.search.substr(1).split("_");
+  if (params[0] == "border") {
+    params[0] = "border-width";
+  }
+  document.write("<style>");
+  document.write((params[1] == "parent") ? "#parent" : "#child");
+  document.write("{ " + params[0] + ": 1px 2px 3px 4px; }</style>");
+}