最简单的js图片切换效果实现代码

<script language =javascript > 
var curIndex=0; 
//时间间隔 单位毫秒 
var timeInterval=5000; 
var arr=new Array(); 
arr[0]="1.jpg"; 
arr[1]="2.jpg"; 
arr[2]="3.jpg"; 
arr[3]="4.jpg"; 
arr[4]="5.jpg"; 
arr[5]="6.jpg"; 
arr[6]="7.jpg"; 
setInterval(changeImg,timeInterval); 
function changeImg() 
{ 
var obj=document.getElementById("showpic"); 
if (curIndex==arr.length-1) 
{ 
curIndex=0; 
} 
else 
{ 
curIndex+=1; 
} 
obj.src="image/"+arr[curIndex]; 
} 
</script> 
<img src="image/1.jpg" width="427" height="219" id="showpic" />