diff --git a/mozilla/layout/html/tests/TestFloaters.html b/mozilla/layout/html/tests/TestFloaters.html
new file mode 100644
index 00000000000..46618f412da
--- /dev/null
+++ b/mozilla/layout/html/tests/TestFloaters.html
@@ -0,0 +1,57 @@
+<BODY>
+ <STYLE>
+  DIV { border: 2px solid khaki; }
+  DIV.left { border: 2px solid green; float: left; width: 100px; }
+  DIV.left2 { border: 5px solid blue; float: left; width: 200px; }
+ </STYLE>
+ <SCRIPT>
+  function getIndex()
+  {
+    var it = document.getElementById("getid");
+    var index = it.value;
+    if (index == "") index = 0;
+    return index;
+  }
+  function makeFloater(clazz)
+  {
+    var div = document.createElement("DIV");
+    var text = document.createTextNode("Block Text");
+    div.appendChild(text);
+    div.setAttribute("CLASS", clazz);
+    return div;
+  }
+  function appendFloater()
+  {
+    var f = makeFloater("left");
+    var it = document.getElementById("it");
+    it.appendChild(f);
+  }
+  function insertFloater()
+  {
+    var f = makeFloater("left2");
+    var it = document.getElementById("it");
+    var kids = it.childNodes;
+    var index = getIndex();
+    if ((index < 0) || (index > kids.length)) index = 0;
+    var before = kids[index];
+    it.insertBefore(f, before);
+  }
+  function removeFloater()
+  {
+    var f = makeFloater("left2");
+    var it = document.getElementById("it");
+    var kids = it.childNodes;
+    var index = getIndex();
+    if ((index < 0) || (index > kids.length)) index = 0;
+    it.removeChild(kids[index]);
+  }
+ </SCRIPT>
+ <FORM>
+  <INPUT TYPE=button ONCLICK="appendFloater();" value="Append Floater">
+  <INPUT TYPE=button ONCLICK="insertFloater();" value="Insert Floater">
+  <INPUT TYPE=button ONCLICK="removeFloater();" value="Remove Floater">
+  <INPUT TYPE=text value="" ID="getid">
+ </FORM>
+ <HR>
+ <DIV ID=it></DIV>
+</BODY>
diff --git a/mozilla/layout/html/tests/TestInline2.html b/mozilla/layout/html/tests/TestInline2.html
new file mode 100644
index 00000000000..e65b9cbfa57
--- /dev/null
+++ b/mozilla/layout/html/tests/TestInline2.html
@@ -0,0 +1,76 @@
+<BODY>
+ <STYLE>
+  DIV { border: 2px solid khaki; }
+ </STYLE>
+ <SCRIPT>
+  var nextID = 1;
+  function getIndex()
+  {
+    var it = document.getElementById("getid");
+    var index = it.value;
+    if (index == "") index = 0;
+    return index;
+  }
+  function makeInline()
+  {
+    var image = document.createElement("IMG");
+    image.setAttribute("SRC", "bluedot.gif");
+    image.setAttribute("WIDTH", "100");
+    image.setAttribute("HEIGHT", "40");
+    image.setAttribute("BORDER", "2");
+    image.setAttribute("ID", "obj" + nextID);
+    nextID++;
+    return image;
+  }
+  function makeBlock()
+  {
+    var block = document.createElement("DIV");
+    var text = document.createTextNode("Block Text");
+    block.appendChild(text);
+    block.setAttribute("ID", "obj" + nextID);
+    nextID++;
+    return block;
+  }
+  function appendInline()
+  {
+    var i = makeInline();
+    var it = document.getElementById("it");
+    it.appendChild(i);
+  }
+  function insertInline()
+  {
+    var i = makeInline();
+    var it = document.getElementById("it");
+    var kids = it.childNodes;
+    var index = getIndex();
+    if ((index < 0) || (index > kids.length)) index = 0;
+    var before = kids[index];
+    it.insertBefore(i, before);
+  }
+  function appendBlock()
+  {
+    var b = makeBlock();
+    var it = document.getElementById("it");
+    it.appendChild(b);
+  }
+  function insertBlock()
+  {
+    var b = makeBlock();
+    var it = document.getElementById("it");
+    var kids = it.childNodes;
+    var index = getIndex();
+    if ((index < 0) || (index > kids.length)) index = 0;
+    var before = kids[index];
+    it.insertBefore(b, before);
+  }
+ </SCRIPT>
+ <FORM>
+  <INPUT TYPE=button ONCLICK="appendInline();" value="Append Inline">
+  <INPUT TYPE=button ONCLICK="insertInline();" value="Insert Inline">
+  <INPUT TYPE=button ONCLICK="appendBlock();" value="Append Block">
+  <INPUT TYPE=button ONCLICK="insertBlock();" value="Insert Block"><BR>
+  <INPUT TYPE=text value="" ID="getid">
+ </FORM>
+ <HR>
+ <B ID=it></B>
+</BODY>
