var curindex=0;
var timeInterval=3000;
var arr=new Array();
arr[0]="images/1.png"
arr[1]="images/2.png"
arr[2]="images/3.png"
arr[3]="images/4.png"
setInterval(changeImg,3000);
function changeImg(){
var obj=document.getElementById("img");
if(curindex==arr.length-1){
curindex=0;
}
else{curindex+=1;
}
obj.src=arr[curindex];
}
代码如下 刚开始用不太习惯 代码都没显示出来：
var curindex=0; var timeInterval=3000; var arr=new Array(); arr[0]="images/1.png" arr[1]="images/2.png" arr[2]="images/3.png" arr[3]="images/4.png" setInterval(changeImg,3000); function changeImg(){ var obj=document.getElementById("img"); if(curindex==arr.length-1){ curindex=0; } else{curindex+=1; } obj.src=arr[curindex]; }