2.[鼠标感应]
与前面一个代码不同的是，当鼠标移动到广告图片上是可以感应显示另外设置好的广告大图效果，下面就是实现效果所需代码：
function bigshow(){
document.all.div_250.style.visibility = 'visible';
document.all.div_80.style.visibility = 'hidden';
}
function bighide(){
document.all.div_80.style.visibility = 'visible';
document.all.div_250.style.visibility = 'hidden';
}
var ad_80= new Array(1);
var ad_250= new Array(1);
ad_80[0]="<a href=http://www.dfeng.net target=_blank><img src=/skin/adv43/ad/ad_ad.gif border=0></a>";
ad_250[0]="<a href=http://www.dfeng.net target=_blank><img src=/skin/adv43/ad/ad_ad2.gif border=0></a>";
var imgheight;
var fubioleft;
window.screen.width>800 ? fubioleft=15:fubioleft=15
document.write('<DIV id=floater_left >');
ad_now = new Date();
ad_id= ad_now.getSeconds() %1
var adhead1="<div id=div_80 style='position:absolute; 95px; height:62px; z-index:12' onMouseOver=bigshow();>";
var adhead2="</div><div id=div_250 style='position:absolute; visibility: hidden; z-index:13; 80; height: 60' onMouseOut=bighide();>";
//var adhead1="<div id=div_80 style='position:absolute; 95px; height:62px; z-index:20' onMouseOut='//MM_showHideLayers(""div_250"","""",""hide"")' onMouseOver='MM_showHideLayers(""div_250"","""",""show"")'>";
//var adhead2="</div><div id=div_250 style='position:absolute; z-index:21;visibility: hidden; 80; height: 60' onMouseOver='MM_showHideLayers(""div_250"","""",""show"")' onMouseOut='MM_showHideLayers(""div_250"","""",""hide"")'>";
document.write(adhead1+ad_80[ad_id]+adhead2+ad_250[ad_id]+"</div>");
document.write ("</div>");
self.onError=null;
currentX = currentY = 0;
whichIt = null;
lastScrollX = 0; lastScrollY = 0;
NS = (document.layers) ? 1 : 0;
IE = (document.all) ? 1: 0;
function heartBeat() {
if(IE) {
diffY = document.body.scrollTop;
diffX = document.body.scrollLeft; }
if(NS) {
diffY = self.pageYOffset; diffX = self.pageXOffset; }
if(diffY != lastScrollY) {
percent = .5 * (diffY - lastScrollY);
if(percent > 0) percent = Math.ceil(percent);
else percent = Math.floor(percent);
if(IE) document.all.floater_left.style.pixelTop += percent;
if(NS) document.floater_left.top += percent;
lastScrollY = lastScrollY + percent;
}
if(diffX != lastScrollX) {
percent = .5 * (diffX - lastScrollX);
if(percent > 0) percent = Math.ceil(percent);
else percent = Math.floor(percent);
if(IE) document.all.floater_left.style.pixelLeft += percent;
if(NS) document.floater_left.left += percent;
lastScrollX = lastScrollX + percent;
}
}
if(NS || IE) action = window.setInterval("heartBeat()",1);var ad_80= new Array(1);
var ad_250= new Array(1);
ad_80[0]="<a href=http://www.dfeng.net target=_blank><img src=/skin/adv43/ad/ad_ad.jpg border=0></a>";
ad_250[0]="<a href=http://www.dfeng.net target=_blank><img src=/skin/adv43/ad/ad_ad.jpg border=0></a>";
var imgheight;
var fubioleft;
window.screen.width>800 ? fubioleft=15:fubioleft=15
document.write('<DIV id=floater_right >');
ad_now = new Date();
ad_id= ad_now.getSeconds() %1
function myload()
{
if (navigator.appName == "Netscape")
{
document.div_right_80.pageX=+window.innerWidth-130;
document.div_right_250.pageX=+window.innerWidth-300;
mymove();
}
else
{
div_right_80.style.left=document.body.offsetWidth-130;
div_right_250.style.left=document.body.offsetWidth-300;
mymove();
}
}
function mymove()
{
if(document.ns)
{
document.div_right_80.left=pageXOffset+window.innerWidth-130;
document.div_right_250.left=pageXOffset+window.innerWidth-300;
setTimeout("mymove();",20)
}
else
{
div_right_80.style.left=document.body.scrollLeft+document.body.offsetWidth-145;
div_right_250.style.left=document.body.scrollLeft+document.body.offsetWidth-300;
setTimeout("mymove();",20)
}
}
var adhead1="<div id=div_right_80 style='position:absolute; 95px; height:60px; z-index:12' onMouseOver=bigshow_right();>";
var adhead2="</div><div id=div_right_250 style='position:absolute; visibility: hidden; z-index:13; 250; height: 250' onMouseOut=bighide_right();><div align=right>";
document.write(adhead1+ad_80[ad_id]+adhead2+ad_250[ad_id]+"</div></div>");
myload()
document.write ("</div>");
self.onError=null;
currentX_right = currentY_right = 0;
whichIt_right = null;
lastScrollX_right = 0; lastScrollY_right = 0;
NS = (document.layers) ? 1 : 0;
IE = (document.all) ? 1: 0;
function heartBeat_right() {
if(IE) {
diffY_right = document.body.scrollTop;
diffX_right = document.body.scrollLeft; }
if(NS) {
diffY_right = self.pageYOffset; diffX_right = self.pageXOffset; }
if(diffY_right != lastScrollY_right) {
percent_right = .5 * (diffY_right - lastScrollY_right);
if(percent_right > 0) percent_right = Math.ceil(percent_right);
else percent_right = Math.floor(percent_right);
if(IE) document.all.floater_right.style.pixelTop += percent_right;
if(NS) document.floater_right.top += percent_right;
lastScrollY_right = lastScrollY_right + percent_right;
}
if(diffX_right != lastScrollX_right) {
percent_right = .5 * (diffX_right - lastScrollX_right);
if(percent_right > 0) percent_right = Math.ceil(percent_right);
else percent_right = Math.floor(percent_right);
if(IE) document.all.floater_right.style.pixelLeft += percent_right;
if(NS) document.floater_right.left += percent_right;
lastScrollX_right = lastScrollX_right + percent_right;
}
}
if(NS || IE) action = window.setInterval("heartBeat_right()",1);
function bigshow_right(){
document.all.div_right_250.style.visibility = 'visible';
document.all.div_right_80.style.visibility = 'hidden';
}
function bighide_right(){
document.all.div_right_80.style.visibility = 'visible';
document.all.div_right_250.style.visibility = 'hidden';
}document.write('');
document.write('');
document.write('');
出处至：http://xiaobingandxiaoer.iteye.com/blog/1917696