function lunhuan(i){
		lunhuan(i);
	}
	function lunhuan(i){
		switch(i){
			case 1:
			document.getElementById("8_1").style.display="block";
			document.getElementById("8_2").style.display="none";
			document.getElementById("8_3").style.display="none";
			document.getElementById("8_4").style.display="none";
			document.getElementById("8_5").style.display="none";

			break;
			case 2:
			document.getElementById("8_1").style.display="none";
			document.getElementById("8_2").style.display="block";
			document.getElementById("8_3").style.display="none";
			document.getElementById("8_4").style.display="none";
			document.getElementById("8_5").style.display="none";

			break;
			case 3:
			document.getElementById("8_1").style.display="none";
			document.getElementById("8_2").style.display="none";
			document.getElementById("8_3").style.display="block";
			document.getElementById("8_4").style.display="none";
			document.getElementById("8_5").style.display="none";
			
			break;
			case 4:
			document.getElementById("8_1").style.display="none";
			document.getElementById("8_2").style.display="none";
			document.getElementById("8_3").style.display="none";
			document.getElementById("8_4").style.display="block";
			document.getElementById("8_5").style.display="none";
			
			break;
			case 5:
			document.getElementById("8_1").style.display="none";
			document.getElementById("8_2").style.display="none";
			document.getElementById("8_3").style.display="none";
			document.getElementById("8_4").style.display="none";
			document.getElementById("8_5").style.display="block";
		}
	}