$(document).ready(function(){
	var objStr = ".change ul li";
	var thisHeigh=$(document.body).outerHeight(true);
	var bodyHeigh=$(window).height();
	if(thisHeigh>bodyHeigh){$("#cks li").css("height",thisHeigh);}else{$("#cks li").css("height",bodyHeigh);}
	$(objStr + ":not(:first)").css("display","none");
	setInterval(function(){
	if( 
	    $(objStr + ":last").is(":visible")){
		$(objStr + ":first").fadeIn("slow").addClass("in").next("show")
		$(objStr + ":last").fadeOut('slow')
	}
	else{
		$(objStr + ":visible").addClass("in");
		$(objStr + ".in").next().fadeIn("slow").next("show")
		$(objStr + ".in").fadeOut('slow').removeClass("in")}
	},6000) //每3秒钟切换
})