Allow text box only for letters using jQuery?

Question

I want to make a text box allow only letters (a-z) using jQuery. Any examples?

Answer 1

// allow only  Alphabets A-Z a-z _ and space
$('.alphaonly').bind('keyup blur',function(){ 
    var node = $(this);
    node.val(node.val().replace(/[^A-Za-z_\s]/,'') ); }   // (/[^a-z]/g,''
);
// allow only  Number 0 to 9
$('.numberonly').bind('keyup blur',function(){ 
    var node = $(this);
    node.val(node.val().replace(/[^0-9]/,'') ); }   // (/[^a-z]/g,''
);