<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
</body>
<script type="text/javascript">
for (i=2;i<=100;i++) {
for (j=2;j<=i;j++) {
if (i%j==0) {
break;
}
}
if (i==j) {
document.write(i+" ");
}
}
</script>
</html>
结果：
2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97
