当点击submit后,使用.getElementById获取id number并使用.value获得他的值储存在number中
可使用i%2==0与i%2==1获得偶数和奇数
得到奇数和b与偶数和后a
使用.getElementById获取id id jishu与id oushu的内容用.innerHTML改变为b和a
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
window.onload = function(){
var subBtn=document.getElementById("addEmpButton");
subBtn.onclick=function(){
var number=document.getElementById("number").value;
var a=0;
var b=0;
for(var i=1;i<=number;i++){
if(i%2==0){
a+=i;
}
document.getElementById("oushu").innerHTML=a
}
for(var i=1;i<=number;i++){
if(i%2==1){
b+=i;
}
document.getElementById("jishu").innerHTML=b
}
document.getElementById("jishuz").innerHTML=number+"以内的奇数和是:"
document.getElementById("oushuz").innerHTML=number+"以内的偶数和是:"
}
}
</script>
请输入一个数<input type="text" name="number" id="number" /><br>
<button id="addEmpButton" value="abc">
Submit
</button><br>
<span id="jishuz"></span><span id="jishu"></span><br>
<span id="oushuz"></span><span id="oushu">将得到该数内所有奇数的和与偶数的和</span>
</body>
</html>