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diff --git a/frontend/gamma/js/Clipperz/YUI/Utils.js b/frontend/gamma/js/Clipperz/YUI/Utils.js
new file mode 100644
index 0000000..4d4a5f9
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+++ b/frontend/gamma/js/Clipperz/YUI/Utils.js
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+/*
+
+Copyright 2008-2011 Clipperz Srl
+
+This file is part of Clipperz's Javascript Crypto Library.
+Javascript Crypto Library provides web developers with an extensive
+and efficient set of cryptographic functions. The library aims to
+obtain maximum execution speed while preserving modularity and
+reusability.
+For further information about its features and functionalities please
+refer to http://www.clipperz.com
+
+* Javascript Crypto Library is free software: you can redistribute
+  it and/or modify it under the terms of the GNU Affero General Public
+  License as published by the Free Software Foundation, either version
+  3 of the License, or (at your option) any later version.
+
+* Javascript Crypto Library is distributed in the hope that it will
+  be useful, but WITHOUT ANY WARRANTY; without even the implied
+  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the GNU Affero General Public License for more details.
+
+* You should have received a copy of the GNU Affero General Public
+  License along with Javascript Crypto Library.  If not, see
+  <http://www.gnu.org/licenses/>.
+
+*/
+
+if (typeof YAHOO == 'undefined') { YAHOO = {}; };
+if (typeof YAHOO.util == 'undefined') { YAHOO.util = {}; };
+if (typeof YAHOO.util.Dom == 'undefined') { YAHOO.util.Dom = {}; };
+
+YAHOO.extend = function(subc, superc, overrides) {
+	var F = function() {};
+	F.prototype=superc.prototype;
+	subc.prototype=new F();
+	subc.prototype.constructor=subc;
+	subc.superclass=superc.prototype;
+	if (superc.prototype.constructor == Object.prototype.constructor) {
+		superc.prototype.constructor=superc;
+	}
+
+	if (overrides) {
+		for (var i in overrides) {
+			subc.prototype[i]=overrides[i];
+		}
+	}
+};
+
+YAHOO.override = function(origclass, overrides){
+	if(overrides){
+		var p = origclass.prototype;
+		for(var method in overrides){
+			p[method] = overrides[method];
+		}
+	}
+};
+
+YAHOO.extendX = function(subclass, superclass, overrides){
+	YAHOO.extend(subclass, superclass);
+	subclass.override = function(o){
+		YAHOO.override(subclass, o);
+	};
+	if(!subclass.prototype.override){
+		subclass.prototype.override = function(o){
+			for(var method in o){
+				this[method] = o[method];
+			}  
+		};
+	}
+	if(overrides){
+		subclass.override(overrides);
+	};
+	
+};
+
+YAHOO.util.Dom.get = function(el) {
+	if (!el) { return null; } // nothing to work with
+	
+	if (typeof el != 'string' && !(el instanceof Array) ) { // assuming HTMLElement or HTMLCollection, so pass back as is
+		return el;
+	}
+	
+	if (typeof el == 'string') { // ID
+		return document.getElementById(el);
+	}
+	else { // array of ID's and/or elements
+		var collection = [];
+	for (var i = 0, len = el.length; i < len; ++i) {
+		collection[collection.length] = YAHOO.util.Dom.get(el[i]);
+	}
+	
+		return collection;
+	}
+	
+	return null; // safety, should never happen
+};
+