$("#textareaid").bind("paste", function(e){
    // access the clipboard using the api
    var pastedData = e.originalEvent.clipboardData.getData('text');
    alert(pastedData);
} );

or you can try this way JQuery paste
There is one more way out, that you can do it so with onChange or focusOut events on textbox

You could disable ctrl+v combination and right click as well.

for IE, you may tap into following event handlers:

Copyonpaste="return false;" 
oncut="return false;" 
oncontextmenu="return false;" 
oncopy="return false;".

Here is a workaround for all browsers:

Copyfunction noCTRL(e) {
      var code = (document.all) ? event.keyCode : e.which;
      var ctrl = (document.all) ? event.ctrlKey : e.modifiers & Event.CONTROL_MASK;
      var msg = "Sorry, this functionality is disabled.";
      if (document.all) {
        if (ctrl && code == 86) {
          //CTRL+V
          alert(msg);
          window.event.returnValue = false;
        } else if (ctrl && code == 67) { 
         //CTRL+C (Copy)
          alert(msg);
          window.event.returnValue = false;
        }
      } else {
        if (ctrl == 2) {
          //CTRL key
          alert(msg);
          return false;
        }
      }
    }

In HTML section, your fields would look like:

CopyEmail :<input name="email" type="text" value=""/><br/>
Password :<input name="password" type="password" value=""/><br/>
Confirm Email :<input name="email" type="text" value="" onkeydown="return noCTRL(event)"/>    
Confirm Password :<input name="password" type="password" value="" onkeydown="return noCTRL(event)"/>

I don't think user can copy password fields if input type is password

Hope this helps.

Note:

1. Disabling JavaScript in browser will let users do whatever they want
2. Always Keep this in mind: respect user's freedom.

Keep a record of the last keycode pressed. Since you're using onkeydown, a cmd-v would show up as an event with keycode 224 (cmd) and then an event with keycode 86 (v). If the previous key matches cmd and the latter v, allow it through.

(you would probably check for ctrl for Windows/Linux pasters as well)

Add a class of 'disablecopypaste' to the inputs you want to disable the copy paste functionality on and add this jQuery script

  $(document).ready(function () {
    $('input.disablecopypaste').bind('copy paste', function (e) {
       e.preventDefault();
    });
  });

This appears to be the answer:

punctuated.setCustomValidity(real.validationMessage);

I just bound that to the page load, and a click and keyup event for the punctuated input, and it seems to work. So when the user types stuff into the punctuated input, it gets copied over to the real input and validated using the html attributes, and then the click and keyup events pass the validation message to the punctuated input.

Copy pasting email regex is okay. You should probably know the basics of regex, but that isn't going to come from that email regex, it will come from simple regex that you end up needing to build yourself. Like I recently discovered that number inputs in firefox still allow you to enter text so I had to write a regex that only accepted numbers and number-related punctuation (plus special characters like backspace). That kind of simple thing will give you a basis in regex that you can rely on, but email regex is just something you can copy.