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var Arraylist = ["http://pic.58pic.com/58pic/16/06/72/87a58PICWRj_1024.jpg","http://img.zcool.cn/community/[email protected]","http://img.zcool.cn/community/[email protected]","http://cdn.duitang.com/uploads/item/201603/06/20160306140033_NiUah.jpeg","http://pic.58pic.com/58pic/14/62/50/62558PICxm8_1024.jpg"];
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i = sel.value;
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selOption += "<option value = '"+k+"'>第"+(k+1)+"张</option>";
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document.getElementById('sel').innerHTML = selOption;
document.getElementById('cimg').src = Arraylist[0];
var ci = function(){
document.getElementById('cimg').src = Arraylist[i];
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i = 0;
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setInterval(ci, 1000);
</script></body></html>