// JavaScript Document


// スクロール
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);
  }
}
//roll



$(document).ready(function() {

	var imgUrl = "00"+Math.floor(Math.random()*8+1);
	imgUrl = "<img src='images/home/"+imgUrl+".jpg' />";
	$("#mainImg").append(imgUrl);
	


	
	 $("#topMenu").append($('<div id="topMenuBg"></div>'));
	 $("#topMenu ul").hide();
	 $("#topMenuBg").hide();
     $("#topMenu").hover(function() {  
     			 $("#topMenu ul").show();$("#topMenuBg").show();
                $(this).stop().animate({ height: '200px'}, 200,"swing"); 
                },function() {  
                $(this).stop().animate({ height: '30px'}, 200,"swing");
                $("#topMenu ul").hide();$("#topMenuBg").hide();
                });
                
      
                
     
     
});