

<html>
<body>

<form method="post" action="demo_aspnet_panel.aspx" id="ctl00">
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwULLTE3MTU2OTA5NjhkGAEFHl9fQ29udHJvbHNSZXF1aXJlUG9zdEJhY2tLZXlfXxYBBQZjaGVjazFZh8fsExeeMjYQRLXqs5oZ/m8Jf5bKKgwIKCIEjJfA4g==" />

<input type="hidden" name="__VIEWSTATEGENERATOR" id="__VIEWSTATEGENERATOR" value="7B1A959E" />
<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEdAAOxvzeMG9klp0DVWBoc0nNwn8hhIJObUkJ9Sisl+XJ2QvFOuDuz94bvRQgA6h3c7Gr9lty1RBRMWCVL4XI4Z5sWh3q64sXnpe7pCpDcr7NxWg==" />
<div id="panel1">
	
Hello World!

</div>
<input id="check1" type="checkbox" name="check1" /><label for="check1">隐藏 Panel 控件</label>
<br /><br />
<input type="submit" name="ctl01" value="重新加载" />
</form>

</body>
</html>