moved oppositeQuadrant() function from Anchored.js to Util.js, where it is now a static function on the OpenLayers.Bounds class. Updated usage in code accordingly. Added test.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@343 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Util.js

@@ -454,6 +454,22 @@ OpenLayers.Bounds.fromString = function(str) {
 };
 
 
+/**
+ * @param {String} quadrant 
+ * 
+ * @returns The opposing quadrant ("br" "tr" "tl" "bl"). For Example, if 
+ *           you pass in "bl" it returns "tr", if you pass in "br" it 
+ *           returns "tl", etc.
+ * @type String
+ */
+OpenLayers.Bounds.oppositeQuadrant = function(quadrant) {
+    var opp = "";
+    
+    opp += (quadrant.charAt(0) == 't') ? 'b' : 't';
+    opp += (quadrant.charAt(1) == 'l') ? 'r' : 'l';
+    
+    return opp;
+};
 
 // Some other helpful things