Download Demo

CFMESSAGEBOX

The <cfmessage> tag lets you display a pop-up window and gather information in it.

There are loads of MODAL modules out there. I used this one :-

Listing 2 : index.cfm

<cfif IsDefined("submitMainForm")>
    <cfdump var="#FORM#">
</cfif>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>CFMESSAGEBOX Alternative</title>
    <link rel="stylesheet" href="css/custom.css">
    <script src="//code.jquery.com/jquery-1.9.1.js"></script>
    <script src="js/jquery.modal.min.js"></script>
    <script src="js/main.js"></script>
</head>
<cfoutput>
<body>
    <form name="mainForm" action="index.cfm" method="post">
        <ul>
            <li>
                <button name="showNameForm" id="showNameForm">Enter your name</button>
            </li>
            <li>
                <span id="message"></span>
            </li>
            <li>
                <button type="submit" name="submitMainForm" id="submitMainForm">Submit the form</button>
            </li>
        </ul>
        <!--- THESE TWO VARIABLES ARE CHANGE BY THE JS THAT RUNS WHEN submitName IS CLICKED  --->
        <input type="hidden" name="firstName" id="firstName" value="">
        <input type="hidden" name="lastName" id="lastName" value="">
    </form>
    <!--- NOTE THIS FORM IS HIDDEN --->
    <form class="login_form modal" id="nameForm" style="display:none;">
        <h3>Please enter your name</h3>
        <p>
            <label>Firstname:</label>
            <input type="text" name="txtFirstname" id="txtFirstname" />
        </p>
        <p>
            <label>Lastname:</label>
            <input type="text" name="txtLastname" id="txtLastname" type="text" />
        </p>
        <p>
            <input type="button" id="submitName" value="Submit" />
        </p>
    </form>
</body>
</cfoutput>
<footer>
</footer>
</html>

Listing 3 : custom.css

ul li {
    margin-left: -20px;
    list-style-type: none;
}
.modal {
    display: none;
    width: 400px;
    background: #fff;
    padding: 15px 30px;
    -webkit-border-radius: 8px;
    -moz-border-radius: 8px;
    -o-border-radius: 8px;
    -ms-border-radius: 8px;
    border-radius: 8px;
    -webkit-box-shadow: 0 0 10px #000;
    -moz-box-shadow: 0 0 10px #000;
    -o-box-shadow: 0 0 10px #000;
    -ms-box-shadow: 0 0 10px #000;
    box-shadow: 0 0 10px #000;
}
.modal a.close-modal {
    position: absolute;
    top: -12.5px;
    right: -12.5px;
    display: block;
    width: 30px;
    height: 30px;
    text-indent: -9999px;
    background: url(../images/close.png) no-repeat 0 0;
}
.login_form.modal {
    border-radius: 0;
    line-height: 18px;
    padding: 0;
    font-family: "Lucida Grande", Verdana, sans-serif;
}
.login_form h3 {
    margin: 0;
    padding: 10px;
    color: #fff;
    font-size: 14px;
    background: -moz-linear-gradient(top, #2e5764, #1e3d47);
    background: -webkit-gradient(linear,left bottom,left top,color-stop(0, #1e3d47),color-stop(1, #2e5764));
}
.login_form.modal p { 
    padding: 20px 30px; border-bottom: 1px solid #ddd; margin: 0;
    background: -webkit-gradient(linear,left bottom,left top,color-stop(0, #eee),color-stop(1, #fff));
    overflow: hidden;
}
.login_form.modal p:last-child { border: none; }
.login_form.modal p label { float: left; font-weight: bold; color: #333; font-size: 13px; width: 110px; line-height: 22px; }
.login_form.modal p input[type="text"],
.login_form.modal p input[type="password"] {
    font: normal 12px/18px "Lucida Grande", Verdana;
    padding: 3px;
    border: 1px solid #ddd;
    width: 200px;
}

Listing 4 : main.js

$(document).on( "click", "#showNameForm", function(e) {
    event.preventDefault();
    $('#nameForm').modal();
});
$(document).on( "click", "#submitName", function(e) {
    //DISPLAY THE NAME THAT WAS JUST ENTERED IN THE MODAL BOX
    $("#message").html('You entered - ' + $("#txtFirstname").val() + ' ' + $("#txtLastname").val());
    //SET THE HIDDEN FORM VARIABLES IN THE MAIN FORM
    $("#firstName").val($("#txtFirstname").val());
    $("#lastName").val($("#txtLastname").val());
    //CLOSE THE MODAL BOX
    $.modal.close();
});

For further information you can reference :-