JavaScriptPractice/form_validation.html at main · EduKeyPath/JavaScriptPractice · GitHub

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<!DOCTYPE html>
<htmllang="en" ng-app="demo">
<head>
<metacharset="UTF-8">
<metaname="description" content="">
<metaname="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" />
<title>demo</title>
</head>
<body>

<formaction="" method="POST" id="" name="" onsubmit="return submitData()">
<label>Name</label>
<inputtype="text" name="" value="" id="name" />
<br/>

<label>Email</label>
<inputtype="email" name="" value="" id="email" />
<br/>

<label>Mobile</label>
<inputtype="number" name="" value="" id="number" />
<br/>
<buttontype="submit">Submit</button>
</form>

<script>
functionsubmitData(){
if(document.getElementById('name').value==''){
alert('Please Enter name');
document.getElementById('name').focus();
returnfalse;
}
elseif(document.getElementById('email').value==''){
alert('Please Enter Email id');
document.getElementById('email').focus();
returnfalse;
}
elseif(document.getElementById('number').value==''){
alert('Please enter mobile no.');
document.getElementById('number').focus();
returnfalse;
}


}
</script>

</body>
</html>