//ページトップへ
function pageTop() {
 var x1 = x2 = x3 = 0;
 var y1 = y2 = y3 = 0;
 if (document.documentElement) {
 x1 = document.documentElement.scrollLeft || 0;
 y1 = document.documentElement.scrollTop || 0;
 }
 if (document.body) {
 x2 = document.body.scrollLeft || 0;
 y2 = document.body.scrollTop || 0;
 }
 x3 = window.scrollX || 0;
 y3 = window.scrollY || 0;
 var x = Math.max(x1, Math.max(x2, x3));
 var y = Math.max(y1, Math.max(y2, y3));
 window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));
 if (x > 0 || y > 0) {
 window.setTimeout("pageTop()", 25);
 }
}
//ツリーメニュー
function exMenu(tName)
{
	tMenu = document.getElementById(tName).style;
	if (tMenu.display == 'none') tMenu.display = "block"; else tMenu.display = "none";
}
//
function tree(id) {
 if (document.getElementById(id).style.display == "block")
  document.getElementById(id).style.display="none";
 else document.getElementById(id).style.display="block";
}