
<script> function demo(){ var d=document.getElementsByTagName("input")[0].value.split(","); var sum=0; for(var i in d){ sum+=parseInt(d[i]); } var ss=document.getElementsByTagName("div")[0];
ss.innerHTML=sum;
}
</script> <input type="text" size="30" placeholder="请输入数字,以半角逗号分隔"/> <input type="button" onclick="demo()" value="求和"/> <div>
</div>