<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
</head>
<body onload="start();" style="text-align:center;background-color:#cccccc;">
<div id="val" style="width:300px;height:300px;margin-left:auto;margin-right:auto;line-height:300px;background-color:blue;font-size:16em;color:white"></div>
<input type="button" onclick="start();" value="开始">
<input type="button" onclick="stop();" value="停止">
<script>
var inter
function start(){
var i=0;
inter = setInterval(function(){
i +=1;
if(i != 12 && i != 2){
document.getElementById("val").innerHTML=i;
}
if(i == 17){
i = 1;
}
},100);
}
function stop(){
window.clearInterval(inter);
}
</script>
</body>
</html>
