懒惰（但聪明地）载入内容

$(document).ready(function(){
	$.get("slides-html", function(data){
		var sNav = [
		'<ul class="slide-nav">',
		'<li><a class="prev" href="#welcome-slides">Previous</a></li>',
		'<li><a class="next" href="#welcome-slides">Next</a></li>',
		'</ul>'
		].join("");

		$(".welcome .slides")
		.append(data)
		.wrapInner('<div class="slidewrap"><div id="welcome-slides" class="slider"></div></div>')
		.find(".slidewrap")
		.append(sNav)
		.carousel({
			slide:'.figure'
		});
	});
});

if(screen.width>480){
	$(document).ready(function(){....});
}