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HELP! Event Handling- Develop an event handler to handle onclick Form Validation event when a user clicks the submit button on the Survey Form. The event handler should validate the following: o The Name tesxt box should contain only Alphabets. o The Address text boxes should contain only appropriate numeric, alphabet or alphanumeric characters o Make sure at least two checkboxes are checked. o Make sure a radio button option is selected. o The Email Address should be valid. Validate above requirements and alert the user with a consolidated error message if the user missed filling out anything on the form that did not meet above criteria. Only the fields with errors should be cleared on alert and not all fields. In addition, ensure that there is a Reset button on the form and when clicked, the Reset button clears the form contents

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Answer #1

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Here a new web page with name "SurveyForm.html" is created, which contains following code.

Note : Kindly design form as per requirement.Here form is designed for demonstration purpose only.

SurveyForm.html :

<!DOCTYPE html>

<html>

<head>

<!-- title for web page -->

<title>Survey Form</title>

<meta charset="utf-8">

<!--style is used for stylesheet -->

<style>

fieldset {

width: 50%;

}

</style>

<!-- <script> is used for javascript -->

<script>

//function validateForm()

function validateForm() {

//selecting all elements from the form using

//Javascript document.getElementById() method

//Name

var name = document.getElementById("name").value;

//address

var address = document.getElementById("address").value;

//emailAddress

var emailAddress = document.getElementById("emailAddress").value;

//agree

var agree = document.getElementById("agreeToTerms");

//if any field is empty then

if (name == "" || address == "" || emailAddress == "" || agree.checked == false) {

alert("Kindly enter all fields");

return false;

}

//validation for email address

//email expression

emailExp = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([com\co\.\in])+$/; // to validate email id

if (emailAddress != '') {

if (!emailAddress.match(emailExp)) {

//if email is not valid then alert() user

alert("Invalid Email Id");

//set focus to emailAddress

document.surveyForm.emailAddress.focus();

return false;

}

}

//check if hobbies are selected

if ((document.surveyForm.chkHobbies[0].checked == false) &&

(document.surveyForm.chkHobbies[1].checked == false) &&

(document.surveyForm.chkHobbies[2].checked == false) &&

(document.surveyForm.chkHobbies[3].checked == false)) {

alert("Please Choose hobbies ");

return false;

}

//if less than two checkbox are selected

var count = 0;

hobbies = document.getElementsByName("chkHobbies");

for (var i = 0; i < hobbies.length; i++) {

if (hobbies[i].checked == true) {

//increment the count

count++;

}

}

if (count < 2) {

//alert the user

alert("Kindly select at least two hobbles");

return false;

}

//validation for gender

if ((document.surveyForm.gender[0].checked == false) &&

(document.surveyForm.gender[1].checked == false)) {

//alert user

alert("Please choose your Gender: Male or Female");

return false;

}

//function to check only alphabets

var alphaExp = /^[a-zA-Z]+$/;

if (!name.match(alphaExp)) {

alert("Please enter only alphabets");

//set focus to name

document.surveyForm.name.focus();

return false;

}

//function to check only alphabets , numbers

var alphaExp = /^[a-zA-Z0-9]+$/;

if (!address.match(alphaExp)) {

alert("Please enter only alpha numeric characters");

//set focus to name

document.surveyForm.address.focus();

return false;

}


// if form is submitted successfullt them

document.getElementById("myPara").innerHTML = "<h1>Form is valid and submitted Successfully</h1>"

}

</script>

</head>

<body>

<div id="wrapper">

<header>

<h1 class="center">Survey Form</h1>

<p class="center">Please enter the following information. Fields marked with an asterisk (<span class="required">*</span>) are

required.

</p>

</header>

<div id="content">

<!-- form with method attribute -->

<form name="surveyForm" id="surveyForm" method="post" action="javascript:void(0);" onsubmit="return(validateForm())">

<fieldset>

<table>

<tr>

<td>

<span class="required">*</span><label for="firstName">Enter Name:</label>

</td>

<td>

<!-- textbox for name -->

<input type="text" name="name" id="name" />

</td>

</tr>

<tr>

<td> <span class="required">*</span><label for="gender">Gender</label> </td>

<td>

<!-- radio buttons -->

<input type="radio" name="gender" value="Male" />Male

<input type="radio" name="gender" value="FeMale" />Female

</td>

</tr>

<tr>

<td>

<span class="required">*</span><label for="address">Address:</label>

</td>

<td>

<!-- textbox for address -->

<input type="text" name="address" id="address">

</td>

</tr>

<tr>

<td><span class="required">*</span>

<label for="hobbies">Hobbies</label>

</td>

<td>

<!-- checkbox for hobbies -->

<input type="checkbox" name="chkHobbies"> Cycling

<input type="checkbox" name="chkHobbies"> Tracking <br/>

<input type="checkbox" name="chkHobbies"> Texting

<input type="checkbox" name="chkHobbies"> Internet Surffing

</td>

</tr>

<tr>

<td><span class="required">*</span>

<label for="emailAddress">Email address:</label></td>

<!-- textbox for email -->

<td><input type="text" name="emailAddress" id="emailAddress"></td>

</tr>

<tr>

<td>Check if you agree with our Terms and Conditions</td>

<!--checkbox -->

<td><input type="checkbox" name="agreeToTerms" id="agreeToTerms" value="yes"></td>

</tr>

<tr>

<!-- submit button -->

<td colspan="2"><input type="submit" name="btnSubmit" id="btnSubmit" value="Submit Registration">

<!-- reset button -->

<input type="reset" name="btnReset" id="btnReset" value="Reset Form"></td>

</tr>

</table>

</fieldset>

<p id="myPara"></p>

</form>

</div>

<!-- End Content -->

<footer>

<p>&copy;Survey Form. All rights reserved.</p>

</footer>

</div>

<!-- End Wrapper -->

</body>

</html>

======================================================

Output :  Open SurveyForm.html in the browser and will get the screen as shown below

Screen 1 : SurveyForm.html

Survey Forrm ← → C ⓘlocalhost:8080/SurveyForm.html Survey Form Please enter the following information. Fields marked with an

Screen 2 : Screen when all fields are empty

Screen 3 : Invalid email id

Screnn 4 : Name contains number or symbol

Screen 5 : Address contains symbol

Screen 6 : Less than 2 Checkboxes are checked

Screen 7 : Screen when gender is not selected

Screen 8 : Valid form

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.

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