var currentState = 0;
			var btns = new Array('rd_button1', 'rd_button2', 'rd_button3', 'rd_button4');
			
			function MouseOn(state)
			{
				if (state != currentState)
					{
						$(btns[state]).setStyle('background-position: 0px -77px;');
					}
			}
			
			function MouseOff(state)
			{
				if (state != currentState)
					{
						$(btns[state]).setStyle('background-position: 0px 0px;');
					}
			}
			
			function OnClick(state)		
			{
				var myx = 0;
				if (state != currentState)
					{
						$(btns[currentState]).setStyle('background-position: 0px 0px;');
					}
					
				currentState = state;
					
				$(btns[currentState]).setStyle('background-position: 0px -77px;');
			
				myx = state*-449;
						
				new Effect.Move('sliding_icons_content', 
					{ 
						x: myx, y: 0, mode: 'absolute', duration: 1.0})
			}