function S(){
		document.getElementById("td2").style.display="block";
		document.getElementById("td1").style.display="none";
		document.getElementById("td3").style.display="none";
		document.getElementById("source").src="./images/index_a_03.jpg";
		document.getElementById("front").src="./images/index_a2_041.jpg";
		document.getElementById("place").src="./images/index_a2_05.jpg";
		document.getElementById("img1").src="./images/index2_06.jpg";
		document.getElementById("img2").src="./images/index_12.jpg";
		document.getElementById("iframe1").height="555px";		
	}
function F(){
		document.getElementById("td2").style.display="none";
		document.getElementById("td1").style.display="block";
		document.getElementById("td3").style.display="none";
		document.getElementById("source").src="./images/index_a2_03.jpg";
		document.getElementById("front").src="./images/index_a_041.jpg";
		document.getElementById("place").src="./images/index_a2_05.jpg";
		document.getElementById("img1").src="./images/index2_06.jpg";
		document.getElementById("img2").src="./images/index_12.jpg";
		document.getElementById("iframe1").height="870px";
	}	
function B(){
		document.getElementById("td2").style.display="none";
		document.getElementById("td1").style.display="none";
		document.getElementById("td3").style.display="block";
		document.getElementById("source").src="./images/index_a2_03.jpg";
		document.getElementById("front").src="./images/index_a2_041.jpg";
		document.getElementById("place").src="./images/index_a_05.jpg";
		document.getElementById("img1").src="./images/index2_06.jpg";
		document.getElementById("img2").src="./images/index_12.jpg";
		document.getElementById("iframe1").height="555px";		
	}