<?xml version="1.0" encoding="utf-8"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="500px" height="500px" viewBox="0 0 500 500">
<title>SVG link drag and drop: helper file</title>
<textArea x="10" y="10" width="480" height="200" font-size="30">Drop circle onto gray box below. Box should turn green once circle is dropped.</textArea>
<rect x="10" y="220" width="480" height="270" fill="gray"/>
<script type="application/ecmascript">
var rect = document.querySelector('rect');
rect.addEventListener('dragenter',
function (event)
	{event.preventDefault();}
,false);
rect.addEventListener('dragover',
function (event)
	{event.preventDefault();}
,false);
rect.addEventListener('drop',
function (event)
	{rect.setAttribute('fill',(event.dataTransfer.getData('text/uri-list').replace(/\r\n$/,'') == 'data:text/plain,1')?'green':'red');}
,false);
</script>
</svg>