How to prevent user pasting text in a textbox?

Question

I have this JS function that prevents user from typing characters

<script type="text/javascript"> function validate(evt) {   var theEvent = evt || window.event;   var key = theEvent.keyCode || theEvent.which;   key = String.fromCharCode(key);   var regex = /[0-9]|\./;   if(!regex.test(key)) {     theEvent.returnValue = false;     if(theEvent.preventDefault) theEvent.preventDefault();   } } </script>  <span>Radio Receive:</span> <input name="ReceiveNo" type="text" class="txtbox" onkeypress='validate(event)' maxlength="11" value="${cpCon.receiveNo}" required tabindex="34" /> 

But I noticed that when the user tried to paste a word from this textbox, the text can be entered. How can I prevent this without disabling the paste?

Answer 1

Very Easy Solution:

<input name="ReceiveNo" type="text" class="txtbox" onkeypress='validate(event)' maxlength="11" value="${cpCon.receiveNo}" required tabindex="34" onCopy="return false" onDrag="return false" onDrop="return false" onPaste="return false" autocomplete=off /> 

This worked for me very well. No one can paste now into your textbox using right button paste option of mouse or pressing ctrl+v from the keyboard.

Answer 2

// To Disable the paste functionality

$(document).ready(function(){   $('#txtInput').bind("paste",function(e) {       e.preventDefault();   }); }); 

// Below One might be helpful for your functionality.

$(document).ready(function(){   $('#txtInput').bind("paste",function(e) {     validate(e);   }); }); 

or

OnTabOut() or onblur() you can validate the entered / pasted text instead of handling the paste functionality.