1 files changed, 12 insertions, 0 deletions
diff --git a/gnu/javax/swing/text/html/css/BorderWidth.java b/gnu/javax/swing/text/html/css/BorderWidth.java
index b717020e3..ae64c2110 100644
--- a/gnu/javax/swing/text/html/css/BorderWidth.java
+++ b/gnu/javax/swing/text/html/css/BorderWidth.java
@@ -63,4 +63,16 @@ public class BorderWidth
       floatValue = 3.F;
   }
 
+  /**
+   * Checks if the specified value makes up a valid border-width value.
+   *
+   * @param value the value to check
+   *
+   * @return <code>true</code> if the value is a valid border-width
+   */
+  public static boolean isValid(String value)
+  {
+    return value.equals("thin") || value.equals("medium")
+           || value.equals("thick") || Length.isValid(value);
+  }
 }