HTML表单与javascript得到"在IE，但在Chrome工作

HTML form with javascript gets "NaN" in IE but works in Chrome

本文关键字：IE 但在 工作 Chrome quot 表单 javascript 得到 HTML      更新时间：2023-09-26

我绝不是一个程序员，但我设法让这在Chrome中工作，但当我在IE上尝试时，我得到了"NaN"(如果这很重要的话)。它基本上需要4个标准，并做一些数学计算来给出一个报价。有人能帮忙吗?

<html>
<head>
<title>instant inspection quote tool</title>
<SCRIPT Language="JavaScript">
function calculateFee(frm){
   var building     = frm.building.value
   var distance     = frm.distance.value
   var age          = frm.age.value
   var sqft         = frm.sqft.value
   var total        = 0
   building = Number(building)
   distance = Number(distance)
   age      = Number(age)
   sqft     = Number(sqft)
   total    = Number(total)
   total = building + distance + age + sqft
   frm.total.value = total
}
</script>

</head>
<body>
<h1>Inspection Fee Calculator</h1>
<form method="post" action="">
Select the type of home
          <br><input type="radio" name="building" value="375"> detached
          <br><input type="radio" name="building" value="350"> semi-detached
          <br><input type="radio" name="building" value="350"> condo or freehold townhome - end unit
          <br><input type="radio" name="building" value="325"> condo or freehold townhome - interior unit
          <br><input type="radio" name="building" value="299"> condo apartment
<br><br>Is the home within 50 kms of Ottawa?   
          <br><input type="radio" name="distance" value="0"> yes
          <br><input type="radio" name="distance" value="25"> no
<br><br>Is the home less than 50 years old?    
          <br><input type="radio" name="age" value="0"> yes
          <br><input type="radio" name="age" value="25"> no
<br><br>Is the home less than 2000 square feet?    
          <br><input type="radio" name="sqft" value="0"> yes
          <br><input type="radio" name="sqft" value="25"> no
<br><br>
<input type="button" name="button" value="Calculate Fee" onClick="calculateFee(this.form)"> 
<table>
    <tr>
      <td align="right">Total Inspection fee:</td>
      <td>
        <input type="text" name="total" size="30" maxlength="30">
      </td>
    </tr>
</table>
</form>
</body>
</html>

试试这个-注意:querySelector和querySelectorAll在IE中不起作用<</p>

现场演示 

function calculateFee(frm) {
  var total = 0,
      rads  = frm.querySelectorAll('input:checked'); // get all checked radios
  for (var i = 0; i < rads.length; i++) {
    var num = Number(rads[i].value);
    total += isNaN(num) ? 0 : num;
  }
  frm.total.value = total;
}

对于单独的单选值使用名称-然而，如果不选中单选，直接获取值将失败

var building = frm.querySelector("input[name=building]:checked");
if (building) total += Number(building.value);

要验证，连接表单的onsubmit 

function validate(frm) {
  var rads  = frm.querySelectorAll('input:checked'); // get all checked radios
  if (rads.length<4) {
    alert("Please select one of each");
    return false; // cancel form
  }
  return true;
}    
window.onload=function() {
  document.forms[0].onsubmit=function() {
    return validate(this);
  }
}

如果这些值都没有勾选，那么这些值就是未定义的。

function getRadioValue( radioElement ){
    for (var i=0; i < radioElement.length; i++){
       if ( radioElement[i].checked ){
          return radioElement[i].value;
       }
    }
}

将前面的代码替换为下面的…

 var building     = getRadioValue( frm.building ) || 0;
   var distance     = getRadioValue( frm.distance ) || 0;
   var age          = getRadioValue( frm.age ) || 0;
   var sqft         = getRadioValue( frm.sqft ) || 0;
   var total        = 0

试试这个:

var building     = frm.querySelector("[name=building]:checked");
var distance     = frm.querySelector("[name=distance]:checked");
var age          = frm.querySelector("[name=age]:checked");
var sqft         = frm.querySelector("[name=sqft]:checked");
building = (building && building.value) || 0;
distance = (distance && distance.value) || 0;
age = (age && age.value) || 0;
sqft = (sqft && sqft.value) || 0;
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