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form.html
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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {font-family: Arial, Helvetica, sans-serif;}
/* The Modal (background) */
.modal {
display: none; /* Hidden by default */
position: fixed; /* Stay in place */
z-index: 1; /* Sit on top */
padding-top: 100px; /* Location of the box */
left: 0;
top: 0;
width: 100%; /* Full width */
height: 100%; /* Full height */
overflow: auto; /* Enable scroll if needed */
background-color: rgb(0,0,0); /* Fallback color */
background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}
/* Modal Content */
.modal-content {
background-color: #446696;;
margin: auto;
padding: 20px;
border: 1px solid #888;
width: 18%;
}
/* The Close Button */
.close {
color: #aaaaaa;
float: right;
font-size: 28px;
font-weight: bold;
}
.close:hover,
.close:focus {
color: #000;
text-decoration: none;
cursor: pointer;
}
.form-container input[type=text], .form-container input[type=password] {
height: 20px;
padding: 15px 0;
background: none;
border: none;
width: 100%;
border-bottom: 1px solid rgba(256, 256, 256, .5);
}
.form-container input[type=text], .form-container input::placeholder {
color: #ffffff;
opacity: 1;
font-size: medium;
text-align: center;
margin-bottom:1em;
}
/* When the inputs get focus, do something */
.form-container input[type=text]:focus, .form-container input[type=text]:focus {
border-bottom: 1px solid rgba(256, 256, 256, .5);
}
/* Set a style for the submit/login button */
.form-container .btn {
color: #1d55a8;
cursor: pointer;
width: 100%;
height: 3em;
margin-top:10px;
margin-bottom:5px;
background: #ffffff;
box-shadow: inset 0 0 0 50px #ffffff;
}
/* Add some hover effects to buttons */
.form-container .btn:hover, .open-button:hover {
opacity: 1;
color: #ffffff;;
background: transparent;
box-shadow: inset 0 0 0 0 #ffffff;
border-color: #ffffff;
}
</style>
</head>
<body>
<!-- Trigger/Open The Modal -->
<button id="myBtn">Open Modal</button>
<!-- The Modal -->
<div id="myModal" class="modal">
<!-- Modal content -->
<div class="modal-content">
<span class="close">×</span>
<div class="form-popup" id="myForm">
<form action="" class="form-container">
<h3 style="color: white; text-align: center;">BMI Calculator</h3>
<input type="text" placeholder="Enter Height" name="height" required>
<input type="text" placeholder="Enter Weight" name="Weight" required>
<button type="submit" class="btn">Check BMI</button>
</form>
</div>
</div>
</div>
<script>
// Get the modal
var modal = document.getElementById("myModal");
// Get the button that opens the modal
var btn = document.getElementById("myBtn");
// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
// When the user clicks the button, open the modal
btn.onclick = function() {
modal.style.display = "block";
}
// When the user clicks on <span> (x), close the modal
span.onclick = function() {
modal.style.display = "none";
}
// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = "none";
}
}
</script>
</body>
</html>