//<!-- 頁面滾動動態載入資料，頁面下拉自動載入內容 -->
	$(window).scroll(function(){          
		totalheight =parseFloat($(window).scrollTop())+ parseFloat($(window).height());  
	  if(($(document).height()/2) <= totalheight ) {  //有滾動條 且滾動到觸發點(一半)
	     next();
	  }  
	});  
	$(window).on('mousewheel', function(event) { //手機不支援
		totalheight =parseFloat($(window).scrollTop())+ parseFloat($(window).height());
		if(totalheight==$(document).height()) //無滾動條
		{
		if(event.originalEvent.wheelDelta<0) //且 向下滾動
		   		next();
		}
	});