JavaScript 09 简单的加法计算器 

<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB2312">
</head>
  
<style>
input{
  width:50px;
}
</style>
<script>
function calc(){
var num1= document.getElementById("num1").value;
var num2= document.getElementById("num2").value;
num1 = parseFloat(num1);
num2 = parseFloat(num2);
var result = num1+num2;
document.getElementById("result").value=result;
  
}
</script>
<input type="text" id="num1"> +
  
<input type="text" id="num2" >
=
<input type="text" id="result" >
  
<input type="button" value="运算" onclick="calc()">

 

posted @ 2020-07-16 21:35  Jasper2003  阅读(319)  评论(0)    收藏  举报