<!DOCTYPE html>
<html>
<head>
<title> 事件</title>
<script type="text/javascript">
function count(){
var oTxt1=parseInt(document.getElementById("txt1").value);
var oTxt2=parseInt(document.getElementById("txt2").value);
var oSel=parseInt(document.getElementById("select").value);
var result;
switch(oSel){
case"+":
result=oTxt1+oTxt2;
break;
case"-":
result=oTxt1-oTxt2;
break;
case"*":
result=oTxt1*oTxt2;
break;
case"/":
result=oTxt1/oTxt2;
break;
default:
alert("false!")
break;
}
document.getElementById("fruit").value=result;
}
</script>
</head>
<body>
<input type='text' id='txt1' />
<select id='select'>
<option value='+'>+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type='text' id='txt2' />
<input type='button' value=' = ' onlinck="count()"/> <!--通过 = 按钮来调用创建的函数,得到结果-->
<input type='text' id='fruit' />
</body>
</html>
你为什么吧运算符也化成整数?
onclick写错了