English Chars & Nums

Allow input only english characters and numbers into text box.

by Anil D

HTML

<input id="mytextbox" value="">

JavaScript

$('#mytextbox').bind('keydown',function() { 
     
    if(event.keyCode == 8 || event.keyCode == 46){
        event.returnValue = true;
        return;
    }
    
    var ch = String.fromCharCode(event.keyCode);
    var filter = /[a-zA-Z0-9]/;
    if(!filter.test(ch)){
      event.returnValue = false;    
    }    
});