Sometime we need to only Only letters (Alphabets) & Numbers on input fields so on this blog I will explain how to validate using JavaScript
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function lettersdigits(input){
var regex=/[^0-9a-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) & Numbers allow</h1>
<body>
Please Enter Name <br>
<input type="text" onkeyup="lettersdigits(this)" >
</body>
</html>