﻿var x = 50,y = 60;
var xin = true, yin = true;
var step = 1 ;
var delay = 10;
var obj=document.getElementById("ad") ;
function floatAD() {
var L=T=0;
var R= document.body.clientWidth-obj.offsetWidth;
var B = document.body.clientHeight-obj.offsetHeight;
obj.style.left = x + document.body.scrollLeft;
obj.style.top = y + document.body.scrollTop;
x=x+step*(xin?1:-1);
if(x<L){xin=true;x=L;} 
if(x>R){xin=false;x=R;} 
y=y+step*(yin?1:-1);
if(y<T){yin=true;y=T;} 
if(y>B){yin=false;y=B;} 
}
var itl=setInterval("floatAD()",delay);
obj.onmouseover=function(){clearInterval(itl);} 
obj.onmouseout=function(){itl=setInterval("floatAD()", delay);}




/*var list=document.getElementsByTagName("p");
var p=list[list.length-1];
var a=document.createElement('<a href="http://www.cqdjw.cn/Index.html" target="_blank">');
a.style.marginLeft="15px";
a.innerHTML='<font color="#000000">重庆教育信息技术与装备</font>';
p.appendChild(a);

a=document.createElement('<a href="http://www.cqteacher.cn/index.html" target="_blank">');
a.style.marginLeft="15px";
a.innerHTML='<font color="#000000">重庆教师研修网</font>';
p.appendChild(a);
*/


/*
try{
	var $div=document.body.firstChild.nextSibling.nextSibling;
	var $list=$div.childNodes;
	var $table=$list[3].getElementsByTagName("table")[16].getElementsByTagName("table")[2];
	var $tr=document.createElement('<tr bgcolor="#e7e7e7">');
	var $td=document.createElement('<td colspan="4" height="1">');
	$tr.appendChild($td);
	$table.firstChild.appendChild($tr);
	$tr=$table.rows[$table.rows.length-2].cloneNode(true);
	$tr.childNodes[1].innerHTML='<a class="LINK6" href="../dhwg/index.html">动画王国</a>';
	$tr.childNodes[2].innerHTML="&nbsp;";
	$tr.childNodes[3].innerHTML="&nbsp;";
	$table.firstChild.appendChild($tr);
}catch(e){
}*/