function changetwo(obj1,obj2,nclassname,n){
  var m=1-n;
  document.getElementById(obj1+n).className=nclassname;
  document.getElementById(obj2+n).className=nclassname;
  document.getElementById(obj1+m).className="";
  document.getElementById(obj2+m).className="";
}

var CarTimeOut=8000;              //每张图切换时间 (单位毫秒);
var CarShowNum=0;
var CarShowNum1=0;
var imgn=1;
var imgn1=1;

var carzz1=1;
var carzz2=1;

function changecar(){
	changetwo('vip','vipsub','onhot',CarShowNum);
	//changetwo('fxcmv','xcmv','on',CarShowNum);
	CarShowNum=1-CarShowNum;
}

setInterval(changecar,2500);