var ImgW = "200px";
var ImgH = "160px";

document.write('<div id="floatImg" style="top:820px;left:0px;position:absolute;z-index:101;width:200px;height:160px;">'+
    '<div align="right" style="position: absolute; top: 0px; right: 0px; z-index: 200; cursor: pointer;" id="flv1"><span style="color: red; text-decoration: none; font-size: 12px;"><a href="javascript:CloseFl()">[关闭]</a></span></div>'
+'<a href="http://cbn.emoney.cn/" target="_blank"><img src="http://www.emoney.cn/images/ad/down_ad.jpg"  border="0"/></a></div>')

var floatImg = document.getElementById("floatImg");
var delay = 30; //控制每次执行间隔的时间，做越大移动得越慢；
var speed = 1; //控制每次执行移动的距离，值越大移动得越快；
var flagX = 0;
var flagY = 0;

function toPixel(str1) {
    //该函数用于去掉数值后面的px，并将之转化为数字。
    var oldLen = str1.length;
    var newLen = oldLen - 2;

    str2 = str1.slice(0, newLen);
    str3 = parseInt(str2);
    return str3;
}

function flowImg() {
    var bWidth = document.body.clientWidth;
    var bHeight = ((document.documentElement.clientHeight == 0) ? document.body.clientHeight : document.documentElement.clientHeight);
    var bright = document.documentElement.scrollright;
    var bTop = ((document.documentElement.scrollTop == 0) ? document.body.scrollTop : document.documentElement.scrollTop);

    var iWidth = floatImg.offsetWidth;
    var iHeight = floatImg.offsetHeight;
    var iright = toPixel(floatImg.style.right);
    var iLeft = 0;
    var iTop = toPixel(floatImg.style.top);

    //下面一段控制横向移动
    if (iright < (bWidth - iWidth) && flagX == 0) {
        floatImg.style.right = (iLeft + speed) + "px";
    }
    else if (iLeft >= (bWidth - iWidth) && flagX == 0) {
        flagX = 1;
    }
    else if (iLeft > 0 && flagX == 1) {
        floatImg.style.left = (iLeft - speed) + "px";
    }
    else if (0 >= iLeft && flagX == 1) {
        flagX = 0;
    }

    //下面一段控制纵向移动
    if (iTop < (bHeight - iHeight) && flagY == 0) {
        floatImg.style.top = (iTop + speed) + "px";
    }
    else if (iTop >= (bHeight - iHeight) && flagY == 0) {
        flagY = 1;
    }
    else if (iTop > 0 && flagY == 1) {
        floatImg.style.top = (iTop - speed) + "px";
    }
    else if (0 >= iTop && flagY == 1) {
        flagY = 0;
    }
}
function CloseFl()
{
    floatImg.style.display='none';
}
var imgInterval = setInterval("flowImg()", delay);
floatImg.onmouseover = function() { clearInterval(imgInterval); }
floatImg.onmouseout = function() { imgInterval = setInterval("flowImg()", delay); }