var js_F = document.getElementById("js_F"); 
var imgList = ["products/products01.jpg", "products/products02.jpg", "products/products03.jpg", "products/products04.jpg", "products/products05.jpg"]; 
var imgTemp = new Array(); 
for (i=0; i<imgList.length; i++){ 
    imgTemp[i] = new Image(); 
    imgTemp[i].src = imgList[i]; 
} 
var imgs = new Array(); 
var imgID = 0, nextImgID, proveImgID; 
var tf = true; //图片移动方向标志 
var speed1 = 10; speed2 = 3000; //速度 
function imgInit(){ 
    var content = ''; 
    for (i=0; i<imgList.length; i++){ 
        content += '<img src="' + imgList[i] + '" style="left:0;" />\n'; 
    } 
    js_F.innerHTML = content; 
    imgs = js_F.getElementsByTagName('img'); 
    imgs[0].style.zIndex = 20; 
    imgs[1].style.zIndex = 15; 
} 
function imgChange(){ 
    if ((imgID+1)<imgList.length){ 
        nextImgID = imgID + 1; 
    } else if (imgID<imgList.length) { 
        nextImgID = 0; 
    } else { 
        imgID = 0; 
        nextImgID = imgID + 1; 
    } 
    imgs[imgID].style.zIndex = 20; 
    imgs[nextImgID].style.zIndex = 15; 
    setTimeout('imgShow()',speed2); 
} 
function imgShow(){ 
    if (tf){ //imgID向左边移动2/3，nextImgID向右边1/3 
        if (parseInt(imgs[imgID].style.left)>-180){ 
            imgs[imgID].style.left = (parseInt(imgs[imgID].style.left)-10) + 'px'; 
            imgs[nextImgID].style.left = (parseInt(imgs[nextImgID].style.left)+5) + 'px'; 
            setTimeout('imgShow()',speed1); 
        } else { 
            tf = !tf; 
            imgs[imgID].style.zIndex = 15; 
            imgs[nextImgID].style.zIndex = 20; 
            setTimeout('imgShow()',speed1); 
        } 
    } else { 
        if (parseInt(imgs[imgID].style.left)<0){ 
            imgs[imgID].style.left = (parseInt(imgs[imgID].style.left)+10) + 'px'; 
            imgs[nextImgID].style.left = (parseInt(imgs[nextImgID].style.left)-5) + 'px'; 
            setTimeout('imgShow()',speed1); 
        } else { 
            imgs[imgID].style.zIndex = 10; 
            tf = !tf; 
            imgID++; 
            imgChange(); 
        } 
    } 
} 
imgInit(); 
imgChange();