function switch_promo(val,z1,z2,z3,z4,z5)
	{
	var old = false;
	
	var old_val = document.getElementById('promo_val').value;
	if(old_val == "X") 
		{
		old_val = 2;
		old = true;
		}
		
	document.getElementById('promo_val2').value = old_val;
	document.getElementById('promo_val').value = val;
	
	if(old_val != val)
		{
		var F_OUT = 'promo_content_'+old_val;
		var F_IN = 'promo_content_'+val;
	
		if(F_OUT != F_IN || (old == true && val != 1))
			{
			new Effect.Parallel([
				new Effect.Fade(F_OUT, { sync: true}),
				new Effect.Appear(F_IN, { sync: true})
			 ], { duration:0.3 });
			}
			
		document.getElementById('promo_tab_1').style.zIndex = z1;
		document.getElementById('promo_tab_2').style.zIndex = z2;
		document.getElementById('promo_tab_3').style.zIndex = z3;
		document.getElementById('promo_tab_4').style.zIndex = z4;
		document.getElementById('promo_tab_5').style.zIndex = z5;
		}
	}