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Copy pathJavascript_form_validation.html
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Javascript_form_validation.html
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<html lang="en">
<head>
<title>Form validation</title>
<script>
function printError(elemId, hintMsg) {
document.getElementById(elemId).innerHTML = hintMsg;
}
function validateForm() {
var name = document.contactForm.name.value;
var email = document.contactForm.email.value;
var mobile = document.contactForm.mobile.value;
var country = document.contactForm.country.value;
var gender = document.contactForm.gender.value;
var hobbies = [];
var checkboxes = document.getElementsByName("hobbies[]");
for(var i=0; i < checkboxes.length; i++) {
if(checkboxes[i].checked) {
hobbies.push(checkboxes[i].value);
}
}
var nameErr = emailErr = mobileErr = countryErr = genderErr = true;
if(name == "") {
printError("nameErr", "Please enter name");
} else {
var regex = /^[a-zA-Z\s]+$/;
if(regex.test(name) === false) {
printError("nameErr", "Enter valid name");
} else {
printError("nameErr", "");
nameErr = false;
}
}
if(email == "") {
printError("emailErr", "enter your email");
} else {
var regex = /^\S+@\S+\.\S+$/;
if(regex.test(email) === false) {
printError("emailErr", "Please enter a valid email");
} else{
printError("emailErr", "");
emailErr = false;
}
}
if(mobile == "") {
printError("mobileErr", "Please enter mobile number");
} else {
var regex = /^[1-9]\d{9}$/;
if(regex.test(mobile) === false) {
printError("mobileErr", "Please enter a valid mobile number");
} else{
printError("mobileErr", "");
mobileErr = false;
}
}
if(country == "Select") {
printError("countryErr", "Please select country");
} else {
printError("countryErr", "");
countryErr = false;
}
if(gender == "") {
printError("genderErr", "Please select gender");
} else {
printError("genderErr", "");
genderErr = false;
}
if((nameErr || emailErr || mobileErr || countryErr || genderErr) == true) {
return false;
} else {
var dataPreview = "You've entered the following details: \n" +
"Full Name: " + name + "\n" +
"Email Address: " + email + "\n" +
"Mobile Number: " + mobile + "\n" +
"Country: " + country + "\n" +
"Gender: " + gender + "\n";
if(hobbies.length) {
dataPreview += "Hobbies: " + hobbies.join(", ");
}
alert(dataPreview);
}
};
</script>
</head>
<body>
<form name="contactForm" onsubmit="return validateForm()" action="/examples/actions/confirmation.php" method="post">
<h2>Application Form</h2>
<div class="row">
<label>Full Name</label>
<input type="text" name="name">
<div class="error" id="nameErr"></div>
</div>
<div class="row">
<label>Email Address</label>
<input type="text" name="email">
<div class="error" id="emailErr"></div>
</div>
<div class="row">
<label>Mobile Number</label>
<input type="text" name="mobile" maxlength="10">
<div class="error" id="mobileErr"></div>
</div>
<div class="row">
<label>Country</label>
<select name="country">
<option>Select</option>
<option>Australia</option>
<option>India</option>
<option>United States</option>
<option>United Kingdom</option>
</select>
<div class="error" id="countryErr"></div>
</div>
<div class="row">
<label>Gender</label>
<div class="form-inline">
<label><input type="radio" name="gender" value="male"> Male</label>
<label><input type="radio" name="gender" value="female"> Female</label>
</div>
<div class="error" id="genderErr"></div>
</div>
<div class="row">
<label>Hobbies <i>(Optional)</i></label>
<div class="form-inline">
<label><input type="checkbox" name="hobbies[]" value="sports"> Sports</label>
<label><input type="checkbox" name="hobbies[]" value="movies"> Movies</label>
<label><input type="checkbox" name="hobbies[]" value="music"> Music</label>
</div>
</div>
<div class="row">
<input type="submit" value="Submit">
</div>
</form>
</body>
</html>