function a(i){
		selecta(i);
	}
	function selecta(i){
		switch(i){
			case 1:
			document.getElementById("gousi").style.display="block";
			document.getElementById("gousi1").style.display="none";
			document.getElementById("gousi2").style.display="none";
			document.getElementById("gousi3").style.display="none";
			break;
			case 2:
			document.getElementById("gousi").style.display="none";
			document.getElementById("gousi1").style.display="block";
			document.getElementById("gousi2").style.display="none";
			document.getElementById("gousi3").style.display="none";
			break;
			case 3:
			document.getElementById("gousi").style.display="none";
			document.getElementById("gousi1").style.display="none";
			document.getElementById("gousi2").style.display="block";
			document.getElementById("gousi3").style.display="none";
			break;
			case 4:
			document.getElementById("gousi").style.display="none";
			document.getElementById("gousi1").style.display="none";
			document.getElementById("gousi2").style.display="none";
			document.getElementById("gousi3").style.display="block";
			break;

		}
	}