diff --git a/mozilla/layout/generic/crashtests/337883-1.html b/mozilla/layout/generic/crashtests/337883-1.html
new file mode 100644
index 00000000000..d89466a51db
--- /dev/null
+++ b/mozilla/layout/generic/crashtests/337883-1.html
@@ -0,0 +1,20 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<html class="reftest-wait">
+<head>
+<script>
+
+function foop()
+{
+  document.getElementById("xxx").style.height = "10%";
+  document.getElementById("yyy").style.position = "relative";
+  
+  document.documentElement.removeAttribute("class");
+}
+
+window.addEventListener("load", function(){setTimeout(foop, 30)}, false);
+
+</script>
+</head>
+
+<body>--<a id="yyy"><IMG align="right"></a><br id="xxx">==</body></html>
+
diff --git a/mozilla/layout/generic/crashtests/337883-2.html b/mozilla/layout/generic/crashtests/337883-2.html
new file mode 100644
index 00000000000..1334bf46b98
--- /dev/null
+++ b/mozilla/layout/generic/crashtests/337883-2.html
@@ -0,0 +1,21 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<html class="reftest-wait">
+<head>
+<style id="s"></style>
+<script>
+
+function foop()
+{
+  var stylesheet = document.getElementById("s");
+  stylesheet.textContent = "#xxx { height: 10%; } #yyy { position: relative; }";
+  
+  document.documentElement.removeAttribute("class");
+}
+
+window.addEventListener("load", function(){setTimeout(foop, 30)}, false);
+
+</script>
+</head>
+
+<body>--<a id="yyy"><IMG align="right"></a><br id="xxx">==</body></html>
+
diff --git a/mozilla/layout/generic/crashtests/crashtests.list b/mozilla/layout/generic/crashtests/crashtests.list
index 74e9f1b1f41..cc44325a905 100644
--- a/mozilla/layout/generic/crashtests/crashtests.list
+++ b/mozilla/layout/generic/crashtests/crashtests.list
@@ -5,6 +5,8 @@ load 331284-1.xhtml
 load 334105-1.xhtml
 load 334147-1.xhtml
 load 337412-1.html
+load 337883-1.html
+load 337883-2.html
 load 342322-1.html
 load 348991-1.xhtml
 load 359371-1.html
