Change the direction of the text dynamically based on the user input. Source: http://stackoverflow.com/a/7770258/458204

change-text-direction-of-input-or-textbox-automatically.js

$('input, textarea').keyup(function(){
    $this = $(this);
    if($this.val().length == 1)
    {
        var x =  new RegExp("[\x00-\x80]+"); // is ascii
        
        //alert(x.test($this.val()));
        
        var isAscii = x.test($this.val());
        
        if(isAscii)
        {
            $this.css("direction", "ltr");
        }
        else
        {
            $this.css("direction", "rtl");
        }
    }
        
});