<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=gb2312">
<TITLE>多幅图片切换的特效</TITLE>
<SCRIPT type="text/javascript">
var count=1;
function ppt(){
for(var i=1;i<5;i++){
if(count==i){
document.getElementById("pic"+count).style.display="block";
}else{
document.getElementById("pic"+i).style.display="none";
}
}
count++;
if(count==5){
count=1;
}
}
setInterval("ppt()",1800)
</SCRIPT>
</HEAD>
<BODY>
<DIV id="pic1"><img src="images/pic1.jpg" width="400" height="313"></DIV>
<DIV id="pic2" style="display:none"><IMG src="images/pic2.jpg" width="400" height="300"></DIV>
<DIV id="pic3" style="display:none"><IMG src="images/pic3.jpg" width="400" height="300"></DIV>
<DIV id="pic4" style="display:none"><IMG src="images/pic4.jpg" width="400" height="300"></DIV>
</BODY>
</HTML>
效果图：
