function flow(a){
			var flowA = document.getElementById("flowA");
			var flowB = document.getElementById("flowB");
			var flowC = document.getElementById("flowC");
			var flowD = document.getElementById("flowD");
			var flowE = document.getElementById("flowE");
			var flowF = document.getElementById("flowF");
			if(a == 1){flowA.style.top="0";}
			if(a == 2){flowA.style.top="-160px";}
			if(a == 3){flowB.style.top="0";}
			if(a == 4){flowB.style.top="-160px";}
			if(a == 5){flowC.style.top="0";}
			if(a == 6){flowC.style.top="-160px";}
			if(a == 7){flowD.style.top="-80px";}
			if(a == 8){flowD.style.top="-240px";}
			if(a == 9){flowE.style.top="-80px";}
			if(a == 10){flowE.style.top="-240px";}
			if(a == 11){flowF.style.top="-80px";}
			if(a == 12){flowF.style.top="-240px";}
			}