diff --git a/content/html/style/src/nsComputedDOMStyle.cpp b/content/html/style/src/nsComputedDOMStyle.cpp
index e578344c6048..1377424eb13a 100644
--- a/content/html/style/src/nsComputedDOMStyle.cpp
+++ b/content/html/style/src/nsComputedDOMStyle.cpp
@@ -75,6 +75,7 @@ private:
 
   nsresult GetDisplay(nsIFrame *aFrame, nsIDOMCSSPrimitiveValue*& aValue);
 
+  nsresult GetBehavior(nsIFrame *aFrame, nsIDOMCSSPrimitiveValue*& aValue);
   nsCOMPtr<nsIPresShell> mPresShell;
   nsCOMPtr<nsIContent> mContent;
   nsString mPseudo;
@@ -217,8 +218,18 @@ NS_IMETHODIMP
 nsComputedDOMStyle::GetPropertyValue(const nsString& aPropertyName,
                                      nsString& aReturn)
 {
-  // TBI
-  return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+  nsCOMPtr<nsIDOMCSSValue> val;
+
+  aReturn.Truncate();
+
+  nsresult rv = GetPropertyCSSValue(aPropertyName, getter_AddRefs(val));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (val) {
+    rv = val->GetCssText(aReturn);
+  }
+
+  return rv;
 }
 
 
@@ -238,6 +249,8 @@ nsComputedDOMStyle::GetPropertyCSSValue(const nsString& aPropertyName,
   nsCSSProperty prop = nsCSSProps::LookupProperty(aPropertyName);
 
   switch (prop) {
+  case eCSSProperty_behavior :
+    rv = GetBehavior(frame, *getter_AddRefs(val)); break;
   case eCSSProperty_display :
     rv = GetDisplay(frame, *getter_AddRefs(val)); break;
   case eCSSProperty_width :
@@ -257,10 +270,10 @@ nsComputedDOMStyle::GetPropertyCSSValue(const nsString& aPropertyName,
   }
 
   if (val) {
-    val->QueryInterface(NS_GET_IID(nsIDOMCSSValue), (void **)aReturn);
+    rv = val->QueryInterface(NS_GET_IID(nsIDOMCSSValue), (void **)aReturn);
   }
 
-  return NS_OK;
+  return rv;
 }
 
 
@@ -344,12 +357,48 @@ nsComputedDOMStyle::GetBackgroundRepeat(nsString& aBackgroundRepeat)
   return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
 }
 
-NS_IMETHODIMP
-nsComputedDOMStyle::GetBehavior(nsString& aBehavior)
+#endif
+
+nsresult
+nsComputedDOMStyle::GetBehavior(nsIFrame *aFrame,
+                                nsIDOMCSSPrimitiveValue*& aValue)
 {
-  return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+  nsISupports *tmp = NS_STATIC_CAST(nsIComputedDOMStyle *, this);
+
+  nsROCSSPrimitiveValue *val = new nsROCSSPrimitiveValue(tmp, mT2P);
+  NS_ENSURE_TRUE(val, NS_ERROR_OUT_OF_MEMORY);
+
+  nsStyleUserInterface uiStyle;
+  const nsStyleUserInterface* ui = nsnull;
+
+  if (aFrame) {
+    aFrame->GetStyleData(eStyleStruct_UserInterface, (const nsStyleStruct*&)ui);
+  } else {
+    nsCOMPtr<nsIPresContext> presCtx;
+    mPresShell->GetPresContext(getter_AddRefs(presCtx));
+    NS_ENSURE_TRUE(presCtx, NS_ERROR_FAILURE);
+
+    nsCOMPtr<nsIStyleContext> styleCtx;
+    presCtx->ResolveStyleContextFor(mContent, nsnull, PR_FALSE,
+                                    getter_AddRefs(styleCtx));
+    NS_ENSURE_TRUE(styleCtx, NS_ERROR_FAILURE);
+
+    styleCtx->GetStyle(eStyleStruct_UserInterface, uiStyle);
+    ui = &uiStyle;
+  }
+
+  if (ui) {
+    val->SetString(ui->mBehavior);
+  } else {
+    val->SetString("");
+  }
+
+  return val->QueryInterface(NS_GET_IID(nsIDOMCSSPrimitiveValue),
+                             (void **)&aValue);
 }
 
+#if 0
+
 NS_IMETHODIMP
 nsComputedDOMStyle::GetBorder(nsString& aBorder)
 {
diff --git a/content/html/style/src/nsROCSSPrimitiveValue.cpp b/content/html/style/src/nsROCSSPrimitiveValue.cpp
index 26ee91a0e1af..0c669e8a9c60 100644
--- a/content/html/style/src/nsROCSSPrimitiveValue.cpp
+++ b/content/html/style/src/nsROCSSPrimitiveValue.cpp
@@ -24,10 +24,12 @@
 
 #include "nsCOMPtr.h"
 #include "nsDOMError.h"
+#include "prprf.h"
 
 
 nsROCSSPrimitiveValue::nsROCSSPrimitiveValue(nsISupports *aOwner, float aT2P)
-  : mType(0), mTwips(0), mString(), mOwner(aOwner), mT2P(aT2P), mScriptObject(nsnull)
+  : mType(CSS_PX), mTwips(0), mString(), mOwner(aOwner), mT2P(aT2P),
+    mScriptObject(nsnull)
 {
   NS_INIT_REFCNT();
 }
@@ -86,7 +88,77 @@ NS_IMETHODIMP
 nsROCSSPrimitiveValue::GetCssText(nsString& aCssText)
 {
   aCssText.Truncate();
-  return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+
+  switch (mType) {
+    case CSS_PX :
+      {
+        PRInt32 px = NSTwipsToIntPixels(mTwips, mT2P);
+        aCssText.AppendInt(px);
+        aCssText.AppendWithConversion("px");
+
+        break;
+      }
+    case CSS_CM :
+      {
+        float val = NS_TWIPS_TO_CENTIMETERS(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("cm");
+        break;
+      }
+    case CSS_MM :
+      {
+        float val = NS_TWIPS_TO_MILLIMETERS(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("mm");
+        break;
+      }
+    case CSS_IN :
+      {
+        float val = NS_TWIPS_TO_INCHES(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("in");
+        break;
+      }
+    case CSS_PT :
+      {
+        float val = NSTwipsToFloatPoints(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("pt");
+        break;
+      }
+    case CSS_STRING :
+      {
+        aCssText.Append(mString);
+        break;
+      }
+    case CSS_PC :
+    case CSS_UNKNOWN :
+    case CSS_NUMBER :
+    case CSS_PERCENTAGE :
+    case CSS_EMS :
+    case CSS_EXS :
+    case CSS_DEG :
+    case CSS_RAD :
+    case CSS_GRAD :
+    case CSS_MS :
+    case CSS_S :
+    case CSS_HZ :
+    case CSS_KHZ :
+    case CSS_DIMENSION :
+    case CSS_URI :
+    case CSS_IDENT :
+    case CSS_ATTR :
+    case CSS_COUNTER :
+    case CSS_RECT :
+    case CSS_RGBCOLOR :
+      return NS_ERROR_DOM_INVALID_ACCESS_ERR;
+  }
+
+  return NS_OK;
 }
 
 
diff --git a/content/html/style/src/nsROCSSPrimitiveValue.h b/content/html/style/src/nsROCSSPrimitiveValue.h
index b82d677725ff..6fff2af2b283 100644
--- a/content/html/style/src/nsROCSSPrimitiveValue.h
+++ b/content/html/style/src/nsROCSSPrimitiveValue.h
@@ -63,6 +63,12 @@ public:
     mType = CSS_STRING;
   }
 
+  void SetString(const nsString& aString)
+  {
+    mString.Assign(aString);
+    mType = CSS_STRING;
+  }
+
 private:
   PRUint16 mType;
 
diff --git a/layout/html/style/src/nsComputedDOMStyle.cpp b/layout/html/style/src/nsComputedDOMStyle.cpp
index e578344c6048..1377424eb13a 100644
--- a/layout/html/style/src/nsComputedDOMStyle.cpp
+++ b/layout/html/style/src/nsComputedDOMStyle.cpp
@@ -75,6 +75,7 @@ private:
 
   nsresult GetDisplay(nsIFrame *aFrame, nsIDOMCSSPrimitiveValue*& aValue);
 
+  nsresult GetBehavior(nsIFrame *aFrame, nsIDOMCSSPrimitiveValue*& aValue);
   nsCOMPtr<nsIPresShell> mPresShell;
   nsCOMPtr<nsIContent> mContent;
   nsString mPseudo;
@@ -217,8 +218,18 @@ NS_IMETHODIMP
 nsComputedDOMStyle::GetPropertyValue(const nsString& aPropertyName,
                                      nsString& aReturn)
 {
-  // TBI
-  return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+  nsCOMPtr<nsIDOMCSSValue> val;
+
+  aReturn.Truncate();
+
+  nsresult rv = GetPropertyCSSValue(aPropertyName, getter_AddRefs(val));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (val) {
+    rv = val->GetCssText(aReturn);
+  }
+
+  return rv;
 }
 
 
@@ -238,6 +249,8 @@ nsComputedDOMStyle::GetPropertyCSSValue(const nsString& aPropertyName,
   nsCSSProperty prop = nsCSSProps::LookupProperty(aPropertyName);
 
   switch (prop) {
+  case eCSSProperty_behavior :
+    rv = GetBehavior(frame, *getter_AddRefs(val)); break;
   case eCSSProperty_display :
     rv = GetDisplay(frame, *getter_AddRefs(val)); break;
   case eCSSProperty_width :
@@ -257,10 +270,10 @@ nsComputedDOMStyle::GetPropertyCSSValue(const nsString& aPropertyName,
   }
 
   if (val) {
-    val->QueryInterface(NS_GET_IID(nsIDOMCSSValue), (void **)aReturn);
+    rv = val->QueryInterface(NS_GET_IID(nsIDOMCSSValue), (void **)aReturn);
   }
 
-  return NS_OK;
+  return rv;
 }
 
 
@@ -344,12 +357,48 @@ nsComputedDOMStyle::GetBackgroundRepeat(nsString& aBackgroundRepeat)
   return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
 }
 
-NS_IMETHODIMP
-nsComputedDOMStyle::GetBehavior(nsString& aBehavior)
+#endif
+
+nsresult
+nsComputedDOMStyle::GetBehavior(nsIFrame *aFrame,
+                                nsIDOMCSSPrimitiveValue*& aValue)
 {
-  return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+  nsISupports *tmp = NS_STATIC_CAST(nsIComputedDOMStyle *, this);
+
+  nsROCSSPrimitiveValue *val = new nsROCSSPrimitiveValue(tmp, mT2P);
+  NS_ENSURE_TRUE(val, NS_ERROR_OUT_OF_MEMORY);
+
+  nsStyleUserInterface uiStyle;
+  const nsStyleUserInterface* ui = nsnull;
+
+  if (aFrame) {
+    aFrame->GetStyleData(eStyleStruct_UserInterface, (const nsStyleStruct*&)ui);
+  } else {
+    nsCOMPtr<nsIPresContext> presCtx;
+    mPresShell->GetPresContext(getter_AddRefs(presCtx));
+    NS_ENSURE_TRUE(presCtx, NS_ERROR_FAILURE);
+
+    nsCOMPtr<nsIStyleContext> styleCtx;
+    presCtx->ResolveStyleContextFor(mContent, nsnull, PR_FALSE,
+                                    getter_AddRefs(styleCtx));
+    NS_ENSURE_TRUE(styleCtx, NS_ERROR_FAILURE);
+
+    styleCtx->GetStyle(eStyleStruct_UserInterface, uiStyle);
+    ui = &uiStyle;
+  }
+
+  if (ui) {
+    val->SetString(ui->mBehavior);
+  } else {
+    val->SetString("");
+  }
+
+  return val->QueryInterface(NS_GET_IID(nsIDOMCSSPrimitiveValue),
+                             (void **)&aValue);
 }
 
+#if 0
+
 NS_IMETHODIMP
 nsComputedDOMStyle::GetBorder(nsString& aBorder)
 {
diff --git a/layout/html/style/src/nsROCSSPrimitiveValue.cpp b/layout/html/style/src/nsROCSSPrimitiveValue.cpp
index 26ee91a0e1af..0c669e8a9c60 100644
--- a/layout/html/style/src/nsROCSSPrimitiveValue.cpp
+++ b/layout/html/style/src/nsROCSSPrimitiveValue.cpp
@@ -24,10 +24,12 @@
 
 #include "nsCOMPtr.h"
 #include "nsDOMError.h"
+#include "prprf.h"
 
 
 nsROCSSPrimitiveValue::nsROCSSPrimitiveValue(nsISupports *aOwner, float aT2P)
-  : mType(0), mTwips(0), mString(), mOwner(aOwner), mT2P(aT2P), mScriptObject(nsnull)
+  : mType(CSS_PX), mTwips(0), mString(), mOwner(aOwner), mT2P(aT2P),
+    mScriptObject(nsnull)
 {
   NS_INIT_REFCNT();
 }
@@ -86,7 +88,77 @@ NS_IMETHODIMP
 nsROCSSPrimitiveValue::GetCssText(nsString& aCssText)
 {
   aCssText.Truncate();
-  return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+
+  switch (mType) {
+    case CSS_PX :
+      {
+        PRInt32 px = NSTwipsToIntPixels(mTwips, mT2P);
+        aCssText.AppendInt(px);
+        aCssText.AppendWithConversion("px");
+
+        break;
+      }
+    case CSS_CM :
+      {
+        float val = NS_TWIPS_TO_CENTIMETERS(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("cm");
+        break;
+      }
+    case CSS_MM :
+      {
+        float val = NS_TWIPS_TO_MILLIMETERS(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("mm");
+        break;
+      }
+    case CSS_IN :
+      {
+        float val = NS_TWIPS_TO_INCHES(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("in");
+        break;
+      }
+    case CSS_PT :
+      {
+        float val = NSTwipsToFloatPoints(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("pt");
+        break;
+      }
+    case CSS_STRING :
+      {
+        aCssText.Append(mString);
+        break;
+      }
+    case CSS_PC :
+    case CSS_UNKNOWN :
+    case CSS_NUMBER :
+    case CSS_PERCENTAGE :
+    case CSS_EMS :
+    case CSS_EXS :
+    case CSS_DEG :
+    case CSS_RAD :
+    case CSS_GRAD :
+    case CSS_MS :
+    case CSS_S :
+    case CSS_HZ :
+    case CSS_KHZ :
+    case CSS_DIMENSION :
+    case CSS_URI :
+    case CSS_IDENT :
+    case CSS_ATTR :
+    case CSS_COUNTER :
+    case CSS_RECT :
+    case CSS_RGBCOLOR :
+      return NS_ERROR_DOM_INVALID_ACCESS_ERR;
+  }
+
+  return NS_OK;
 }
 
 
diff --git a/layout/html/style/src/nsROCSSPrimitiveValue.h b/layout/html/style/src/nsROCSSPrimitiveValue.h
index b82d677725ff..6fff2af2b283 100644
--- a/layout/html/style/src/nsROCSSPrimitiveValue.h
+++ b/layout/html/style/src/nsROCSSPrimitiveValue.h
@@ -63,6 +63,12 @@ public:
     mType = CSS_STRING;
   }
 
+  void SetString(const nsString& aString)
+  {
+    mString.Assign(aString);
+    mType = CSS_STRING;
+  }
+
 private:
   PRUint16 mType;
 
diff --git a/layout/style/nsComputedDOMStyle.cpp b/layout/style/nsComputedDOMStyle.cpp
index e578344c6048..1377424eb13a 100644
--- a/layout/style/nsComputedDOMStyle.cpp
+++ b/layout/style/nsComputedDOMStyle.cpp
@@ -75,6 +75,7 @@ private:
 
   nsresult GetDisplay(nsIFrame *aFrame, nsIDOMCSSPrimitiveValue*& aValue);
 
+  nsresult GetBehavior(nsIFrame *aFrame, nsIDOMCSSPrimitiveValue*& aValue);
   nsCOMPtr<nsIPresShell> mPresShell;
   nsCOMPtr<nsIContent> mContent;
   nsString mPseudo;
@@ -217,8 +218,18 @@ NS_IMETHODIMP
 nsComputedDOMStyle::GetPropertyValue(const nsString& aPropertyName,
                                      nsString& aReturn)
 {
-  // TBI
-  return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+  nsCOMPtr<nsIDOMCSSValue> val;
+
+  aReturn.Truncate();
+
+  nsresult rv = GetPropertyCSSValue(aPropertyName, getter_AddRefs(val));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (val) {
+    rv = val->GetCssText(aReturn);
+  }
+
+  return rv;
 }
 
 
@@ -238,6 +249,8 @@ nsComputedDOMStyle::GetPropertyCSSValue(const nsString& aPropertyName,
   nsCSSProperty prop = nsCSSProps::LookupProperty(aPropertyName);
 
   switch (prop) {
+  case eCSSProperty_behavior :
+    rv = GetBehavior(frame, *getter_AddRefs(val)); break;
   case eCSSProperty_display :
     rv = GetDisplay(frame, *getter_AddRefs(val)); break;
   case eCSSProperty_width :
@@ -257,10 +270,10 @@ nsComputedDOMStyle::GetPropertyCSSValue(const nsString& aPropertyName,
   }
 
   if (val) {
-    val->QueryInterface(NS_GET_IID(nsIDOMCSSValue), (void **)aReturn);
+    rv = val->QueryInterface(NS_GET_IID(nsIDOMCSSValue), (void **)aReturn);
   }
 
-  return NS_OK;
+  return rv;
 }
 
 
@@ -344,12 +357,48 @@ nsComputedDOMStyle::GetBackgroundRepeat(nsString& aBackgroundRepeat)
   return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
 }
 
-NS_IMETHODIMP
-nsComputedDOMStyle::GetBehavior(nsString& aBehavior)
+#endif
+
+nsresult
+nsComputedDOMStyle::GetBehavior(nsIFrame *aFrame,
+                                nsIDOMCSSPrimitiveValue*& aValue)
 {
-  return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+  nsISupports *tmp = NS_STATIC_CAST(nsIComputedDOMStyle *, this);
+
+  nsROCSSPrimitiveValue *val = new nsROCSSPrimitiveValue(tmp, mT2P);
+  NS_ENSURE_TRUE(val, NS_ERROR_OUT_OF_MEMORY);
+
+  nsStyleUserInterface uiStyle;
+  const nsStyleUserInterface* ui = nsnull;
+
+  if (aFrame) {
+    aFrame->GetStyleData(eStyleStruct_UserInterface, (const nsStyleStruct*&)ui);
+  } else {
+    nsCOMPtr<nsIPresContext> presCtx;
+    mPresShell->GetPresContext(getter_AddRefs(presCtx));
+    NS_ENSURE_TRUE(presCtx, NS_ERROR_FAILURE);
+
+    nsCOMPtr<nsIStyleContext> styleCtx;
+    presCtx->ResolveStyleContextFor(mContent, nsnull, PR_FALSE,
+                                    getter_AddRefs(styleCtx));
+    NS_ENSURE_TRUE(styleCtx, NS_ERROR_FAILURE);
+
+    styleCtx->GetStyle(eStyleStruct_UserInterface, uiStyle);
+    ui = &uiStyle;
+  }
+
+  if (ui) {
+    val->SetString(ui->mBehavior);
+  } else {
+    val->SetString("");
+  }
+
+  return val->QueryInterface(NS_GET_IID(nsIDOMCSSPrimitiveValue),
+                             (void **)&aValue);
 }
 
+#if 0
+
 NS_IMETHODIMP
 nsComputedDOMStyle::GetBorder(nsString& aBorder)
 {
diff --git a/layout/style/nsROCSSPrimitiveValue.cpp b/layout/style/nsROCSSPrimitiveValue.cpp
index 26ee91a0e1af..0c669e8a9c60 100644
--- a/layout/style/nsROCSSPrimitiveValue.cpp
+++ b/layout/style/nsROCSSPrimitiveValue.cpp
@@ -24,10 +24,12 @@
 
 #include "nsCOMPtr.h"
 #include "nsDOMError.h"
+#include "prprf.h"
 
 
 nsROCSSPrimitiveValue::nsROCSSPrimitiveValue(nsISupports *aOwner, float aT2P)
-  : mType(0), mTwips(0), mString(), mOwner(aOwner), mT2P(aT2P), mScriptObject(nsnull)
+  : mType(CSS_PX), mTwips(0), mString(), mOwner(aOwner), mT2P(aT2P),
+    mScriptObject(nsnull)
 {
   NS_INIT_REFCNT();
 }
@@ -86,7 +88,77 @@ NS_IMETHODIMP
 nsROCSSPrimitiveValue::GetCssText(nsString& aCssText)
 {
   aCssText.Truncate();
-  return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+
+  switch (mType) {
+    case CSS_PX :
+      {
+        PRInt32 px = NSTwipsToIntPixels(mTwips, mT2P);
+        aCssText.AppendInt(px);
+        aCssText.AppendWithConversion("px");
+
+        break;
+      }
+    case CSS_CM :
+      {
+        float val = NS_TWIPS_TO_CENTIMETERS(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("cm");
+        break;
+      }
+    case CSS_MM :
+      {
+        float val = NS_TWIPS_TO_MILLIMETERS(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("mm");
+        break;
+      }
+    case CSS_IN :
+      {
+        float val = NS_TWIPS_TO_INCHES(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("in");
+        break;
+      }
+    case CSS_PT :
+      {
+        float val = NSTwipsToFloatPoints(mTwips);
+        char buf[64];
+        PR_snprintf(buf, 63, "%.2fcm", val);
+        aCssText.AppendWithConversion("pt");
+        break;
+      }
+    case CSS_STRING :
+      {
+        aCssText.Append(mString);
+        break;
+      }
+    case CSS_PC :
+    case CSS_UNKNOWN :
+    case CSS_NUMBER :
+    case CSS_PERCENTAGE :
+    case CSS_EMS :
+    case CSS_EXS :
+    case CSS_DEG :
+    case CSS_RAD :
+    case CSS_GRAD :
+    case CSS_MS :
+    case CSS_S :
+    case CSS_HZ :
+    case CSS_KHZ :
+    case CSS_DIMENSION :
+    case CSS_URI :
+    case CSS_IDENT :
+    case CSS_ATTR :
+    case CSS_COUNTER :
+    case CSS_RECT :
+    case CSS_RGBCOLOR :
+      return NS_ERROR_DOM_INVALID_ACCESS_ERR;
+  }
+
+  return NS_OK;
 }
 
 
diff --git a/layout/style/nsROCSSPrimitiveValue.h b/layout/style/nsROCSSPrimitiveValue.h
index b82d677725ff..6fff2af2b283 100644
--- a/layout/style/nsROCSSPrimitiveValue.h
+++ b/layout/style/nsROCSSPrimitiveValue.h
@@ -63,6 +63,12 @@ public:
     mType = CSS_STRING;
   }
 
+  void SetString(const nsString& aString)
+  {
+    mString.Assign(aString);
+    mType = CSS_STRING;
+  }
+
 private:
   PRUint16 mType;