（我是初学者）html求教

function divMove(){
            //来回运动
            var ss=parseFloat(imgObj.style.left);
            if(ss<0||ss>300){
                speed*=-1;
            }
            ss+=speed;
            imgObj.style.left=ss+‘px‘;

            //变换图片
            if(countimg<100){
                imgObj.src=‘../../girl/1.JPG‘;
            }else{
                imgObj.src=‘../../girl/2.JPG‘;
            }
            countimg++;
            if(countimg>=200){
                countimg=0;
            }

            //20毫秒后再次运行该函数
            x=window.setTimeout(‘divMove()‘,20);
        }

function imgChange(){
            var o=imgObj1.style.opacity;
            var o2=imgObj2.style.opacity;
            o-=ospeed;
            if(o<0||o>1){
                ospeed*=-1;
            }
            o2=parseFloat(o2)+parseFloat(ospeed);
            if(o2>1||o2<0){
                ospeed*=-1;
            }
            imgObj1.style.opacity=o;
            imgObj2.style.opacity=o2;

            var x=window.setTimeout(‘imgChange()‘,30);
}