var current_tab = 1;
			
			function showTab(id)
			{
				var tab = document.getElementById("tab"+id);				
				var ctab = document.getElementById("tab"+current_tab);
				
				switch(current_tab)
				{
					case 1:
				  		ctab.className='design';
				  		break;
					case 2:
				  		ctab.className='details';
				  		break;
					case 3:
				  		ctab.className='story';
				  		break;
					case 4:
				  		ctab.className='matching';
				  		break;
				}
				
				var frame = document.getElementById("item-frame-"+current_tab);
				frame.style.display = "none";
				
				tab.className = tab.className+" active";
				current_tab = id;
				
				var frame = document.getElementById("item-frame-"+current_tab);
				frame.style.display = "block";
				
			}