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### html 내에서 img 5초마다 전환
<html>
<head>
<title>hi</title>
<script type="text/javascript">
var imgArray=new Array();
imgArray[0]="1.jpg";
imgArray[1]="2.jpg";
imgArray[2]="3.jpg";
imgArray[3]="4.jpg";
function showImage(){
var imgNum=Math.round(Math.random()*3);
var objImg=document.getElementById("introimg");
objImg.src=imgArray[imgNum];
setTimeout(showImage,5000);
}
</script>
</head>
<body onload="showImage()">
<img id="introimg" border="0">
</body>
</html>