PostSparrow

Javascript Code

<input type="text" name="name" id="name" placeholder="Enter Name" >
<script>
	$(document).ready(function(){
		$("#name").keypress(function(e){
		    var charCode = e.which;
		    /*
		      8 - (backspace)
		      32 - (space)
		      65-98 - (a-z)Alphabet
		    */
		    if(!(charCode >= 65 && charCode <= 90) && !(charCode >= 97 && charCode <= 122) && (charCode != 32 && charCode != 8) && !(charCode == 9)) {
		       return false;
		    }
		});
	});
</script>