Sometime we need to only letters (Alphabets) on input fields so on this blog I will explain how to validate using JavaScript
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function lettersOnly(input) {
var regex=/[^a-z ]/gi;
input.value=input.value.replace(regex,"");
}
</script>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
</head>
<h1>Only letters (Alphabets) allow</h1>
<body>
Please Enter Name <br>
<input type="text" onkeyup="lettersOnly(this)" >
</body>
</html>