Active / Deactive Submit button based on form validation using Javascript | Sanwebcorner

Active / Deactive Submit button based on form validation using Javascript

This post is used to create active deactive the submit button based on the form validation. The validation will check all the fields are correct or not. If all the fields are correct values the submit button will enable otherwise it is on hidding stage. So you can't able to submit up to you complete the form data with validation.

This post is very useful to get the valid information from the user. The full code and demo pages below you can visit and customize the code how you want. I hope this example is really helpful.




Code for active/deactive submit button based on form validation:

<html>
<head>
<title>Enable Disable Submit Button Based on Validation</title>
<style>
#san-button
{
padding: 10px 20px;
background:#4CAF50;
border: 0;
color: #FFF;
display:inline-block;
margin-top:20px;
cursor: pointer;
}
#san-button:disabled
{
padding: 10px 20px;
background: #B9D8BA;
border: 0;
color: #FFF;
display:inline-block;
margin-top:20px;
cursor: no-drop;
}
.validation-error
{
color:#FF0000;
}
.input-control
{
padding:10px;
}
.input-group
{
margin-top:10px;
}
</style>
</head>
<body>
<h1>Enable Disable Submit Button Based on Validation</h1>
<form id="frm" method="post">
<div class="input-group">Name <span class="name-validation validation-error"></span></div>
<div>
<input type="text" name="name" id="name" class="input-control" onblur="validate()" />
</div>

<div class="input-group">Email <span class="email-validation validation-error"></span></div>
<div>
<input type="text" name="email" id="email" class="input-control" onblur="validate()" />
</div>

<div>
<button type="submit" name="btn-submit" id="san-button" disabled="disabled">Submit</button>
</div>
</form>
<script src="http://code.jquery.com/jquery-1.10.2.js"></script>
<script>
function validate() {

var valid = true;
valid = checkEmpty($("#name"));
valid = valid && checkEmail($("#email"));

$("#san-button").attr("disabled",true);
if(valid) {
$("#san-button").attr("disabled",false);
}
}
function checkEmpty(obj) {
var name = $(obj).attr("name");
$("."+name+"-validation").html("");
$(obj).css("border","");
if($(obj).val() == "") {
$(obj).css("border","#FF0000 1px solid");
$("."+name+"-validation").html("Required");
return false;
}

return true;
}
function checkEmail(obj) {
var result = true;

var name = $(obj).attr("name");
$("."+name+"-validation").html("");
$(obj).css("border","");

result = checkEmpty(obj);

if(!result) {
$(obj).css("border","#FF0000 1px solid");
$("."+name+"-validation").html("Required");
return false;
}

var email_regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,3})+$/;
result = email_regex.test($(obj).val());

if(!result) {
$(obj).css("border","#FF0000 1px solid");
$("."+name+"-validation").html("Invalid");
return false;
}

return result;
}
</script>
</body>
</html>