zeroclipboard.js

// this function attaches the ZeroClipboard plugin
// to the newly created button and handles the events
function attachZeroClipboard() {
 var sRTFToCopy = $("#TextBox1").val();
 var client = new ZeroClipboard(document.getElementById('clipboardDropDown'));
    
 client.on('ready', function (event) {
  client.on('copy', function (event) {
   event.clipboardData.setData('application/rtf', sRTFToCopy);
  });

  client.on('aftercopy', function (event) {
   showMessage("Formatted content has been copied to the client clipboard.");
   $("#clipboardDropDown").css("visibility", "hidden");
  });
 });

 client.on('error', function (event) {
  ZeroClipboard.destroy();
 });
}