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(x, Math.floor(y / 1.2));
	  if (x > 0 || y > 0) {
		  window.setTimeout("backToTop()", 20);
	  }
}
function oprnCalendar(){ //v2.0
theURL = 'http://ryubo.jp/event/calendar.php';	
winName = 'calendar';
features = 'scrollbars=yes,resizable=yes,width=1000,height=620';
  obj = window.open(theURL,winName,features);
}
function doc_open(url){
	window.open(url,'demo','toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,scrollbars=yes,width=1024,height=780');
}
function cm_open(url){
	window.open(url,'demo','toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,scrollbars=yes,width=500,height=400');
}
function open_eigyo(url){
	window.open(url,'eigyo','toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,scrollbars=yes,width=350,height=500');
}