HTML form with javascript gets "NaN" in IE but works in Chrome
I am by no means a programmer, but I managed to get this to work in Chrome, but I get "NaN" when I try to use IE (11 if that matters). It basically takes 4 criteria and does some math to get a quote. Can anyone help with this?
<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>
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3 answers
Try this - note: querySelector and querySelectorAll don't work in IE <8 and 8 only in standards mode
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;
}
For individual radio values, use a name - however, getting the value directly occurs if the radio is not checked
var building = frm.querySelector("input[name=building]:checked");
if (building) total += Number(building.value);
To check, connect the onsubmit form
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);
}
}
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If none of the values are "off" then the values are undefined try adding this ...
function getRadioValue( radioElement ){
for (var i=0; i < radioElement.length; i++){
if ( radioElement[i].checked ){
return radioElement[i].value;
}
}
}
Replace the previous code with this ...
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
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Try the following:
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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