var dh_hj_jishu = 0;
$(document).ready(function() {
	$(".hj_dh").css({"visibility":"hidden"});
	dh_hj_jishu = $(".hj_dh").length;
	const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
	dh_hj_scroll(scrollTop);
});
function dh_hj_scroll(scrollTop){
	for(var i=0;i<dh_hj_jishu;i++)
	{
		if($(".hj_dh").eq(i).css('visibility') == "hidden")
		{
			var weizhi = ($(".hj_dh").eq(i).offset().top)+150-window.innerHeight;
			$("#aaa").html(weizhi+"=="+i+"==="+"=="+scrollTop);
			if(weizhi <= scrollTop){
				var css = $(".hj_dh").eq(i).attr("dh_css");
				$(".hj_dh").eq(i).css({"visibility":"visible"});
				$(".hj_dh").eq(i).addClass("dh_kaishi_jiazai");
				$(".hj_dh").eq(i).addClass(css);
			}
		}
	}
}
window.addEventListener("scroll", function() {
	const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
	dh_hj_scroll(scrollTop);
});