i have a Marketing form and i need to change the display error message see Picture.
my form : 
and I want That my error message be like This: 
here is my Code :
<div>
<div>
<meta type="xrm/designer/setting" name="layout-editable" value="marketing-designer-layout-editable">
<meta type="xrm/designer/setting" name="layout-max-width" value="600px" datatype="text" label="Layout max width">
<form data-container="true" style="null" action = "" method = "get" novalidate>
<style>
div[data-editorblocktype=Field-radioButtons]
{
width: 25% ;
text-align: left ;
}
div[data-editorblocktype=Field-radioButtons] input
{
width: auto;
height: auto;
margin-bottom: 3px;
float: right;
}
div[data-editorblocktype=Field-radioButtons] span.lp-radioButton
{
/* This rule is needed to style all radio button fields. For product constraints each option is defined as input and label wrapped into a span*/
display: block;
margin: 2px;
}
[data-layout="true"]
{
margin: 0 auto;
max-width: /* @layout-max-width */
600px /* @layout-max-width */
;
}
</style>
<div data-layout="true" tabindex="0">
<div data-section="true" class="emptyContainer">
<div style=" display: flex;width: 100%;flex-wrap: wrap;">
<div style="clear:both;"></div>
<div data-container="true" class="columnContainer" data-container-width="100" style="display: block; min-height: 70px; min-width: 20px; width: calc(100% - 0px); padding: 10px; float: left; word-wrap: break-word; word-break: break-word; flex-direction: column;">
<div data-editorblocktype="Image">
<div class="imageWrapper" width="100%" align="Center">
<img alt="Test Newsletter" class="" src="https://test/Y0gdmVq8p6izVL5Ig6QF2elBYT71iDv3rsgqHc-uOI8!" style="max-height: 100%; max-width: 100%; position: static; display: block; top: 0px; left: 0px; box-sizing: border-box;">
</div>
</div>
<div data-editorblocktype="Text"><p><big><big><span><strong>Abonnieren Sie unseren </strong></span></big></big><br>
<span><big><big><strong>Test Newsletter!</strong></big></big></span></p>
<p><span style="font-size:16px;">Nach der Übermittlung Ihrer Kontaktdaten erhalten Sie von <em>info@test.de</em> einen Bestätigungslink, um die Anmeldung abzuschließen.</span></p>
</div>
<div data-editorblocktype="Text"><p>* Pflichtfelder</p> </div>
<div data-editorblocktype="Field-text" style="text-align: center;">
<div class="marketing-field" style="text-align: center;">
<div class="lp-form-field" data-required-field="false" style="text-align: left;"><label class="lp-ellipsis" for="3f746946-34b4-442c-a677-e232cdd2bc40" title="">Vorname</label>
<input class="lp-form-fieldInput form-control form-text lp-form-fieldInput" data-requirederrormessage="Pflichtfeld! Bei Bedarf ein Pseudonym verwenden" id="3f746946-34b4-442c-a677-e232cdd2bc40" name="3f746946-34b4-442c-a677-e232cdd2bc40" placeholder="Vorname" style="width:100%" title="" type="text" value="Vorname" autocomplete="given-name">
</div>
</div>
</div>
<div data-editorblocktype="Field-text">
<div class="marketing-field">
<div class="lp-form-field" data-required-field="false"><label class="lp-ellipsis" for="e1dfc514-f301-4cb2-855a-4c8fa8331207" title="">Nachname</label>
<input class="lp-form-fieldInput form-control form-text lp-form-fieldInput" data-requirederrormessage="Pflichtfeld! Bei Bedarf ein Pseudonym verwenden." id="e1dfc514-f301-4cb2-855a-4c8fa8331207" name="e1dfc514-f301-4cb2-855a-4c8fa8331207" placeholder="Nachname" style="width:100%" title="" type="text" value="Nachname " autocomplete="family-name">
</div>
</div>
</div>
<div data-editorblocktype="Field-email">
<div class="marketing-field">
<div class="lp-form-field" data-required-field="true"><label class="lp-ellipsis" for="7f685ebb-7c54-4cff-a1bc-772562d25c38" title="">E-Mail-Adresse</label><span class="lp-required">*</span>
<input class="lp-form-fieldInput form-control form-text lp-form-fieldInput" id="7f685ebb-7c54-4cff-a1bc-772562d25c38" name="7f685ebb-7c54-4cff-a1bc-772562d25c38" placeholder="E-Mail-Adresse" required="required" style="width:100%" title="" type="email" autocomplete="email">
</div>
</div>
</div>
</div>
<div style="clear:both;"></div>
</div>
</div>
<div data-section="true" class="">
<div style="
display: flex;
width: 100%;
;flex-wrap: wrap;">
<div style="clear:both;"></div>
<div data-container="true" class="columnContainer" data-container-width="100" style="display: block; min-height: 70px; min-width: 20px; width: calc(100% - 0px); padding: 10px; float: left; word-wrap: break-word; word-break: break-word; flex-direction: column;">
<div data-editorblocktype="Field-dropdown" style="display: none;">
<div class="marketing-field">
<div class="lp-form-field" data-required-field="true"><label class="lp-ellipsis" for="f7796368-6e5b-e911-a96e-000d3ab496ce" title="">Datenquelle</label><span class="lp-required">*</span>
<select class="lp-form-fieldInput" id="f7796368-6e5b-e911-a96e-000d3ab496ce" name="f7796368-6e5b-e911-a96e-000d3ab496ce" required="required" title="">
<option value="120000002">E-Mail (nachverfolgen)</option>
<option value="120000001">Aktion</option>
<option selected="selected" value="120000003">Newsletter / Mailing</option>
<option value="181510000">Projekt-Workshop</option>
<option value="181510001">Registrierung auf Webportal</option>
<option value="120000000">Veranstaltung</option>
<option value="100000000">Visitenkarte erhalten </option>
</select>
</div>
</div>
</div>
<div data-editorblocktype="SubscriptionListBlock">
<div class="marketing-subscription-list"><input class="lp-form-fieldInput" id="e6648b6d-0894-e911-a971-000d3ab496c3" name="e6648b6d-0894-e911-a971-000d3ab496c3" required="required" type="checkbox"> <label for="e6648b6d-0894-e911-a971-000d3ab496c3">Ich habe die <a href="https://www.test.de/datenschutz">Datenschutzerklärung</a> gelesen und akzeptiert.<span class="lp-required">*</span></label><br>
</div>
</div>
<div class="btn." data-editorblocktype="SubmitButtonBlock">
<p align="“center“"><button class=".btn .btn-primary lp-form-button lp-form-fieldInput" name="submit" type="submit">Anmeldung absenden</button></p>
</div>
</div>
<div style="clear:both;"></div>
</div>
</div>
</div>
</form>
</div>
</div>Advertisement
Answer
As it has already been mentioned in the comments, you should use JavaScript to validate the form. Here is a runnable code snippet:
function formValidate() {
var fname = document.getElementById("fname").value;
var lname = document.getElementById("lname").value;
var email = document.getElementById("email").value;
var tc = document.getElementById("tc");
if (fname.length === 0) {
document.getElementById("errfname").style.display = "block";
document.getElementById("errorbox").style.display = "block";
} else {
document.getElementById("errfname").style.display = "none";
}
if (lname.length === 0) {
document.getElementById("errlname").style.display = "block";
document.getElementById("errorbox").style.display = "block";
} else {
document.getElementById("errlname").style.display = "none";
}
if (email.length === 0) {
document.getElementById("erremail").style.display = "block";
document.getElementById("errorbox").style.display = "block";
} else {
document.getElementById("erremail").style.display = "none";
}
if (tc.checked === false) {
document.getElementById("errtandc").style.display = "block";
document.getElementById("errorbox").style.display = "block";
} else {
document.getElementById("errtandc").style.display = "none";
}
if (fname.length !== 0 && lname.length !== 0 && email.length !== 0 && tc.checked === true) {
window.location.href = "https://stackoverflow.com";
}
}body {
background-color: lightblue;
}
input[type=text],
input[type=email] {
width: 80%;
font-size: 20px;
float: right;
}
.errorbox {
background-color: red;
color: white;
width: 98%;
position: relative;
padding: 1%;
display: none;
}<!DOCTYPE html>
<html>
<head>
<title>Example form</title>
</head>
<body>
<div class="errorbox" id="errorbox">
<p id="errfname" style="display: none;">Please enter your first name!</p>
<p id="errlname" style="display: none;">Please enter your last name!</p>
<p id="erremail" style="display: none;">Please enter your Email address!</p>
<p id="errtandc" style="display: none;">Please check the terms and conditions check box!</p>
</div>
<h1>Test newsletter!</h1>
<p>This is a test newsletter</p>
<p><span style="color: red;">* </span> Required fields</p><br>
<span style="color: red;">*</span>First name:
<input type="text" placeholder="First name" id="fname"><br><br>
<span style="color: red;">*</span>Last name:
<input type="text" placeholder="Last name" id="lname"><br><br>
<span style="color: red;">*</span>Email-address:
<input type="email" placeholder="Email address" id="email"><br><br><br>
<input type="checkbox" name="checkbox" id="tc">I agree to the <a href="#">Terms and Conditions</a> of this website.<br>
<button onclick="formValidate()">Submit</button>
</body>
</html>