// JavaScript Document
            //设置广告块 
var divLeft = 0;
            //设置广告块初始左边位置 
var divTop = 0;
            //设置广告块初始顶部位置 
var divWidth = 225;
            //设置广告块宽度 
var divHeight = 225;
            //设置广告块高度 
var divImg = "image/move.jpg";
            //设置广告图片的URL地址 
var divUrl = "";
            //设置广告链接 
var divTitle = "活动预告";
            //设置div标题
            //飘浮广告 
var _stepx = 2;
_stepy = 2;
            //初始化每次偏离的象素 
var moveSpeed = 40;
            //速度 
var varId;
            //获取setInterval的ID 
function moveAd() {
             //飘浮广告主函数
	var adLeft = parseInt(adDiv.style.left);
	var adTop = parseInt(adDiv.style.top);
	var adWidth = parseInt(adDiv.style.width);
	var adHeight = parseInt(adDiv.style.height);
	var _bodyLeft = document.body.scrollLeft;
	var _bodyTop = document.body.scrollTop;
	var _bodyHeight = document.body.clientHeight + _bodyTop;
	var _bodyWidth = document.body.clientWidth + _bodyLeft;
	if (adLeft <= _bodyLeft) {
		_stepx = 2;
	}
	if (adTop <= _bodyTop) {
		_stepy = 2;
	}
	if ((adLeft + adWidth) >= _bodyWidth) {
		_stepx = -2;
	}
	if ((adTop + adHeight) >= _bodyHeight) {
		_stepy = -2;
	}
	adDiv.style.left = adLeft + _stepx;
	adDiv.style.top = adTop + _stepy;
}
function beginMoveAd() {
             //启动飘浮
	varId = window.setInterval("moveAd()", moveSpeed);
}
             //给窗体的load事件附加飘浮函数
//window.onload = beginMoveAd;