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Form length Property
Form Object
Definition and Usage
The length property returns the number of elements in a form.
Syntax
formObject.length
Browser Support
The length property is supported in all major browsers.
Example
Example
Return the number of elements in a form:
<html>
<body>
<form id="frm1" action="form_action.asp">
First name: <input type="text" name="fname" value="Donald"><br>
Last name: <input type="text" name="lname" value="Duck"><br>
<input type="submit" value="Submit">
</form>
<script>
document.write(document.getElementById("frm1").length);
</script>
</body>
</html>
<body>
<form id="frm1" action="form_action.asp">
First name: <input type="text" name="fname" value="Donald"><br>
Last name: <input type="text" name="lname" value="Duck"><br>
<input type="submit" value="Submit">
</form>
<script>
document.write(document.getElementById("frm1").length);
</script>
</body>
</html>
The output of the script above will be:
3
Try it yourself »
More Examples
Return the value of each element in a form
Form Object
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