小编Sup*_*OVA的帖子

$(document).on("keydown",function(e){
	var story=$("#story"),
		story_con=story.find(".container"),
		story_top=story_con.scrollTop();

	if(story.hasClass("active")){
		// console.log(story_top,story_con.height(),story_con.innerHeight(),story_con.children("div").height(),story_con.children("div").innerHeight(),e.which);
		console.log("Div ScrollTop: "+story_top, "Container Height: "+story_con.height(), "Container InnerHeeight: "+story_con.innerHeight(),"Conatiner Div Height: "+story_con.children("div").height());

		//up arrow
		if(story_top==0 && e.which==38){
			console.log("prev frame")
		}

		//down arrow
		//chrome 280+432 >= 676 i.e. 712>=676 true
		//firefox 207+429 >= 676 i.e 636>=676 false
		else if(story_top + story_con.height() >=story_con.children("div").height() && e.which==40){
			console.log("next frame");
		}
		else{
			story_con.focus();
			console.log(story_con[0]);
			console.log("stopped propagation");
			e.stopImmediatePropagation();
		}
		return;
	} …