var latest_vertical_slide_number = null;
 	
 	function hideLatestSlide(number) {
 		if(latest_vertical_slide_number != null) {
 			if(latest_vertical_slide_number != number) {
 	 			HideVerticalSlide(latest_vertical_slide_number);
 	 			latest_vertical_slide_number = null;
 			}
 		}
 	}

 	function ToggleVerticalSlide(number){
 		hideLatestSlide(number);
 		var myVerticalSlide = new Fx.Slide('vertical_slide_'+number);
 		myVerticalSlide.toggle();
 		latest_vertical_slide_number = number; 
 	}
 	
 	function ShowVerticalSlide(number){
 		hideLatestSlide(number);
 		var myVerticalSlide = new Fx.Slide('vertical_slide_'+number);
 		myVerticalSlide.show();
 		latest_vertical_slide_number = number; 
 	}	
 	function HideVerticalSlide(number){
 		var myVerticalSlide = new Fx.Slide('vertical_slide_'+number);
 		myVerticalSlide.hide();
 		if(latest_vertical_slide_number == number) {
 			latest_vertical_slide_number = null;
 		}
 	}	

 	function ToggleHorizontalSlide(){
 		var myHorizontalSlide = new Fx.Slide('chat',{mode: 'horizontal'});
 		myHorizontalSlide.toggle();
 	}

 	function HideHorizontalSlide(){
 		var myHorizontalSlide = new Fx.Slide('chat',{mode: 'horizontal'});

		
 		myHorizontalSlide.hide();
 	}