Form Validation Script
Improve data accuracy with ease. This script monitors your form fields and alerts the user immediately if they enter letters in a field where numbers are required, ensuring cleaner data submission.
Numbers Only Field Demo
Try entering some letters and clicking Validate!
Copy the Script
<script>
function validateField() {
var inputVal = document.getElementById('numInput').value;
if (isNaN(inputVal) || inputVal == "") {
alert("Error: Please enter a numeric value only.");
return false;
} else {
alert("Success! " + inputVal + " is a valid number.");
return true;
}
}
</script>