document.write("<div id='float_AD' style='position:absolute;'><a href='http://train.teacherclub.com.cn/dts/channel/10zhixing/zhibo/zs_zhiboyemian1.html' target='_blank'><img src='http://www.teacherclub.com.cn/tresearch/static/china_flash/images/kaiban1.jpg' border='0'></a><br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href='javascript:' onclick='this.parentElement.style.display = \"none\"'>¹Ø ±Õ</a></div>");

var xPos = 300;
var yPos = 200; 
var step = 1;
var delay = 30; 
var height = 0;
var Hoffset = 0;
var Woffset = 0;
var yon = 0;
var xon = 0;
var pause = true;
var interval;
//img1.style.top = yPos;
function changePos() 
{
	width = document.body.clientWidth;
	height = document.body.clientHeight;
	Hoffset = float_AD.offsetHeight;
	Woffset = float_AD.offsetWidth;
	float_AD.style.left = xPos + document.body.scrollLeft;
	float_AD.style.top = yPos + document.body.scrollTop;
	if (yon) 
		{yPos = yPos + step;}
	else 
		{yPos = yPos - step;}
	if (yPos < 0) 
		{yon = 1;yPos = 0;}
	if (yPos >= (height - Hoffset)) 
		{yon = 0;yPos = (height - Hoffset);}
	if (xon) 
		{xPos = xPos + step;}
	else 
		{xPos = xPos - step;}
	if (xPos < 0) 
		{xon = 1;xPos = 0;}
	if (xPos >= (width - Woffset)) 
		{xon = 0;xPos = (width - Woffset);   }
	}
	
	function start()
	 {
		float_AD.style.top = yPos;
	 	float_AD.visibility = "visible";
		interval = setInterval('changePos()', delay);
	}
start();