//漂浮物开始
//var zq="<div id='ad' style='position:absolute'><a href='http://www.tax861.gov.cn/zyts/tzgg20070329.htm' target='_blank'><img src='images/sytz.jpg' width='150' height='100' border='0'></a></div>"
//定义zq并赋值
//document.write(zq);//显示出变量信息
  //var x = 50,y = 60//定义变量x并赋值50 变量y并赋值60
  //var xin = true, yin = true//定义变量xin并赋值true 变量yin并赋值为true
  //var step2 = 1//定义变量step2并赋值为1
  //var delay2 = 16//定义变量delay2并赋值为16
  //var obj=document.getElementById("ad") //定义参数0bj并赋值
  //function floatAD() {
     //var L=T=0//定义参数L等于0
     //var R= document.body.clientWidth-obj.offsetWidth//定义参数R并赋值显示页面的区域的宽度减去层的页面内容的实际宽度
     //var B = document.body.clientHeight-obj.offsetHeight//定义参数B并赋值显示页面的区域的宽度减去层的页面内容的实际宽度
     //obj.style.left = x + document.body.scrollLeft//定义层的左边等于参数X加上设置或获取位于对象左边界和窗口中目前可见内容的最最左端之间的距离.scrollLeft是设置或获取位于对象左边界和窗口中目前可见内容的最左端之间的距离.即获取对象相对与版面或由offsetLeft属性制定的父坐标的计算顶端位置
     //obj.style.top = y + document.body.scrollTop//定义层的顶部等于参数加上滚动条的偏移量.scrollTop是滚动条滚动拉的偏移量,即获取对象相对与版面或由offsetTop属性制定的父坐标的计算顶端位置
     //x = x + step2*(xin?1:-1) //2?êyxμèóúx?óé?￡¨2?êystep3?ò?￡¨è?1?2?êyxin?a??￡??μ?a1￡?è?1?2?êy?a?ù￡??μ?a-1￡?￡? 
     //if (x < L) { xin = true; x = L} //è?1?2?êyxD?óúL￡?2?êyxin?a??￡?2?êyxinμèóú2?êyL
     //if (x > R){ xin = false; x = R} //è?1?2?êyx′óóúR￡?2?êyxin?a?ù￡?2?êyxinμèóú2?êyR
     //y = y + step2*(yin?1:-1)//2?êyxμèóúy?óé?￡¨2?êystep3?ò?￡¨è?1?2?êyyin?a??￡??μ?a1￡?è?1?2?êy?a?ù￡??μ?a-1￡?￡? 
     //if (y < T) { yin = true; y = T } //è?1?2?êyYD?óúT￡?2?êyyin?a??￡?2?êyyinμèóú2?êyT
     //if (y > B) { yin = false; y = B } //è?1?2?êyY′óóúB￡?2?êyyin?a?ù￡?2?êyyinμèóú2?êyB
  //}
  //var itl= setInterval("floatAD()", delay2) //???′?′DDchangePos()oˉêy
//obj.onmouseover=function(){clearInterval(itl)} //í￡?1 setInterval() μ÷ó?
//obj.onmouseout=function(){itl=setInterval("floatAD()", delay2)}//???′?′DDchangePos()oˉêy
//漂浮物结束