rollmenu = new Array();

	for (var i=0; i <= 11 ; i++) {
		rollmenu[i] = new Image();
	}

	rollmenu[0].src="/img/gblmenu01.gif";
	rollmenu[1].src="/img/gblmenu01_on.gif";
	rollmenu[2].src="/img/gblmenu02.gif";
	rollmenu[3].src="/img/gblmenu02_on.gif";
	rollmenu[4].src="/img/gblmenu03.gif";
	rollmenu[5].src="/img/gblmenu03_on.gif";
	rollmenu[6].src="/img/gblmenu04.gif";
	rollmenu[7].src="/img/gblmenu04_on.gif";
	rollmenu[8].src="/img/gblmenu05.gif";
	rollmenu[9].src="/img/gblmenu05_on.gif";
	rollmenu[10].src="/img/gblmenu06.gif";
	rollmenu[11].src="/img/gblmenu06_on.gif";


	
function ImgSwap(ImgName, ImgSrc){
		document.images[ImgName].src=rollmenu[ImgSrc].src;
}


function toTop(){
	window.scrollTo(0,0);
}

function backToTop() {
  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("backToTop()", 25);
  }
}


<!-- 折りたたみ

   function showPlagin(idno){  
     pc = ('PlagClose' + (idno));  
    po = ('PlagOpen' + (idno));  
    if( document.getElementById(pc).style.display == "none" ) {  
		document.getElementById(pc).style.display = "block";  
        document.getElementById(po).style.display = "none";  
    }  
     else {  
     document.getElementById(pc).style.display = "none";  
     document.getElementById(po).style.display = "block";  
    }  
   }
   
//-->  

<!-- ツールチップ//-->  

var tooltip=function(){
	var id = 'tt';
	var top = -230;
	var left = 10;
	var maxw = 250;
	var speed = 10;
	var timer = 20;
	var endalpha = 85;
	var alpha = 0;
	var tt,t,c,b,h;
	var ie = document.all ? true : false;
	return{
		show:function(v,w){
			if(tt == null){
				tt = document.createElement('div');
				tt.setAttribute('id',id);
				t = document.createElement('div');
				t.setAttribute('id',id + 'top');
				c = document.createElement('div');
				c.setAttribute('id',id + 'cont');
				b = document.createElement('div');
				b.setAttribute('id',id + 'bot');
				tt.appendChild(t);
				tt.appendChild(c);
				tt.appendChild(b);
				document.body.appendChild(tt);
				tt.style.opacity = 0;
				tt.style.filter = 'alpha(opacity=0)';
				document.onmousemove = this.pos;
			}
			tt.style.display = 'block';
			c.innerHTML = v;
			tt.style.width = w ? w + 'px' : 'auto';
			if(!w && ie){
				t.style.display = 'none';
				b.style.display = 'none';
				tt.style.width = tt.offsetWidth;
				t.style.display = 'block';
				b.style.display = 'block';
			}
			if(tt.offsetWidth > maxw){tt.style.width = maxw + 'px'}
			h = parseInt(tt.offsetHeight) + top;
			clearInterval(tt.timer);
			tt.timer = setInterval(function(){tooltip.fade(1)},timer);
		},
		pos:function(e){
			var u = ie ? event.clientY + document.documentElement.scrollTop : e.pageY;
			var l = ie ? event.clientX + document.documentElement.scrollLeft : e.pageX;
			tt.style.top = (u - h) + 'px';
			tt.style.left = (l + left) + 'px';
		},
		fade:function(d){
			var a = alpha;
			if((a != endalpha && d == 1) || (a != 0 && d == -1)){
				var i = speed;
				if(endalpha - a < speed && d == 1){
					i = endalpha - a;
				}else if(alpha < speed && d == -1){
					i = a;
				}
				alpha = a + (i * d);
				tt.style.opacity = alpha * .01;
				tt.style.filter = 'alpha(opacity=' + alpha + ')';
			}else{
				clearInterval(tt.timer);
				if(d == -1){tt.style.display = 'none'}
			}
		},
		hide:function(){
			clearInterval(tt.timer);
			tt.timer = setInterval(function(){tooltip.fade(-1)},timer);
		}
	};
}();

<!-- ここまで//-->