<!DOCTYPE html>
<title>drag &amp; drop - file drop prompt for server name and document.domain</title>
<style>
  body > div {
    height: 200px;
    width: 200px;
    background-color: orange;
  }
</style>

<script>
window.onload = function() {
	if( location.protocol != 'http:' && location.protocol != 'https:' ) {
		document.getElementsByTagName('p')[0].innerHTML = 'This test should be loaded over http or https.';
		return;
	}
	if( !location.hostname.match(/[^\.]\.[^\.]+\.[^\.]/) ) {
		document.getElementsByTagName('p')[0].innerHTML = 'This test should be loaded from a subdomain that allows document.domain to be set to a parent domain (try using a server name that contains at least two or three dots, for example www.example.org).';
		return;
	}
	var realhost = location.hostname, newdomain = location.hostname.replace(/^[^.]+\./,'');
	try {
		document.domain = location.hostname.replace(/^[^.]+\./,'');
	} catch(e) {
		document.getElementsByTagName('p')[0].innerHTML = 'This test should be loaded from a subdomain that allows document.domain to be set to a parent domain.';
		return;
	}
	var orange = document.getElementsByTagName('div')[0];
	orange.ondragover = orange.ondragenter = orange.ondrop = function(e) {
   	e.preventDefault();
  };
  document.getElementsByTagName('span')[0].innerHTML = realhost;
};
</script>

<div></div>

<p>Drag a file from your desktop onto the orange square. A prompt should appear, identifying the server name as <span></span></p>
<noscript><p>Enable JavaScript and reload</p></noscript>