How can I not allow numeric in input type text

Question

I want my input for Name is cannot typing number mean it only allow letter Now I use like this:

var key = e.keyCode;
 if (!((key == 8) || (key == 32) || 
    (key == 46) || (key >= 35 && key <= 40) || 
    (key >= 65 && key <= 90))) 
 {
  e.preventDefault();
 }

but It work on English letter only. Thank you for every help.

Answer 1

Try this fiddle, it trigger's and rectifies on every input or change of the value to the control

$("#textbox").on("input",function(){ 
this.value=this.value.replace(/[^a-zA-Z]/gi, '')
})

Answer 2

Just use the built in pattern attribute in HTML.

<input type="text" pattern="[A-Za-z]" title="no numbers">