求助，这个简易计算器用不了

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>无标题文档</title>

function count()

{

var d1=document.getElementById("id1").value;

var d2=document.getElementById("id2").value;

var d3=document.getElementById("id3").value;

var d="";

switch(d3){

case "+":

d = parseFloat(d1) + parseFloat(d2);

break;

case "-":

d = parseFloat(d1) - parseFloat(d2);

break;

case "*":

d = parseFloat(d1) * parseFloat(d2);

break;

default:

d = parseFloat(d1) / parseFloat(d2);

}

document.getElementById("id4").value=d;

}

</script>

</head>

<body>

</select>

</body>

</html>

跑起来点击等于的时候显示那N

我們

浏览 1335回答 1