var i = 0;
function chHeigth(nen){
if(i == 0){
	document.getElementById(nen).style.display = "none";
	i =1;
	}else if(i==1){
	document.getElementById(nen).style.display = "block";
	i =0;
	}
}
var f=1;
var g=1;
var h=1;
function chHeigth2007(nen){
if(f == 0){
	document.getElementById(nen).style.display = "none";
	f =1;
	}else if(f==1){
	document.getElementById(nen).style.display = "block";
	f =0;
	}
}
function chHeigth2006(nen){
if(g == 0){
	document.getElementById(nen).style.display = "none";
	g =1;
	}else if(g==1){
	document.getElementById(nen).style.display = "block";
	g =0;
	}
}
function chHeigth2005(nen){
if(h == 0){
	document.getElementById(nen).style.display = "none";
	h =1;
	}else if(h==1){
	document.getElementById(nen).style.display = "block";
	h =0;
	}
}
function hide_bn(){
document.getElementById('back_2005').style.display = "none";
document.getElementById('back_2006').style.display = "none";
document.getElementById('back_2007').style.display = "none";
}
/*NakayamaMasakatsu作成 2008/6/23*/
function showhide(id){
	if(document.getElementById){		
		if(document.getElementById(id).style.display == "none")
        document.getElementById(id).style.display = "block";
      else
        document.getElementById(id).style.display = "none";
		}
}
/*ここまで
 *ブラウザ判別をオブジェクト検出にて行う。document.getElementByIdというオブジェクトを持っているブラウザに対しては同じコードを実行するように最初にIF文を挿入している
*/
/*NakayamaMasakatsu作成 2008/12/9*/
function showhideB(id,mark){
	if(document.getElementById){		
		if(document.getElementById(id).style.display == "none"){
        document.getElementById(id).style.display = "block";
								document.getElementById(mark).src = "./img/information_hide.gif";}
      else{
        document.getElementById(id).style.display = "none";
								document.getElementById(mark).src = "./img/information.gif";	}							
		}
}
/*  */