How to display his result while typing in a field code example

Example: How to display his result while typing in a field

$(document).ready(function() {
	$('#name').on('keypress', function(key) {
		if((key.charCode < 97 || key.charCode > 122) && (key.charCode < 65 || key.charCode > 90) && (key.charCode != 45)) {
			return false;	
		}
	});
	$('#phone').on('keypress', function(key) {
        if(key.charCode < 48 || key.charCode > 57) {
			return false;
		}
    });
});