<body>
<div style=" 300px; height: 100px; border: dotted red 5px; border-radius: 20px;
box-sizing: border-box; font:20px/30px '方正舒体'; color:green; text-align: center;" >
<script type="text/javascript">
var sum=0
for (var i=0;i<=100;i++) {
// 判断是不是偶数
if(i%2===0)
{
sum+=i
}
}
document.writeln('1~100偶数和：'+sum)
document.writeln('<br>------------- <br />')
var sum=0
for (var i=0;i<=100;i++) {
// 判断是不是奇数
if(i%2!=0)
{
sum+=i
}
}
document.writeln('1~100奇数和：'+sum)
</script>
</div>
</body>