add OpenLayers.Util.upperCaseObject() function and test

git-svn-id: http://svn.openlayers.org/trunk/openlayers@491 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Util.js

@@ -785,6 +785,23 @@ OpenLayers.Util.createAlphaImageDiv = function(id, px, sz, imgURL,
 };
 
 
+/** Creates a new hash and copies over all the keys from the 
+*    passed-in object, but storing them under an uppercased
+*    version of the key at which they were stored.
+* 
+* @param {Object} object
+*
+* @returns A new Object with all the same keys but uppercased
+* @type Object
+*/
+OpenLayers.Util.upperCaseObject = function (object) {
+    var uObject = new Object();
+    for (var key in object) {
+        uObject[key.toUpperCase()] = object[key];
+    }
+    return uObject;
+};
+
 /** Takes a hash and copies any keys that don't exist from
 *   another hash, by analogy with Object.extend() from
 *   Prototype.js.