

<html>
<body>

<form method="post" action="demo_aspnet_htmlinputcheckbox.aspx" id="ctl00">
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUKMTE5NzgxMzIxNWQYAQUeX19Db250cm9sc1JlcXVpcmVQb3N0QmFja0tleV9fFgIFA3JlZAUEYmx1Zb/XEDbjMfn0tD2PgV9y+2BODq6HWccRLe1wv21mVL6X" />

<input type="hidden" name="__VIEWSTATEGENERATOR" id="__VIEWSTATEGENERATOR" value="FB9434E1" />
<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEdAAQDnRsXLtsLjzgX/11QwRggosS1oaiIZIjJN7LywYnmdGo0O+SlERZZpqrSWI+c+EzxTrg7s/eG70UIAOod3OxqyDjXzEtQJNdwst0KZV7cjInN4CffcgQ2owujCC5jEUg=" />
您喜欢哪种颜色？
<br />
<input name="red" type="checkbox" id="red" /> 红色
<br />
<input name="blue" type="checkbox" id="blue" /> 蓝色
<br />
<input onclick="__doPostBack('ctl01','')" name="ctl01" type="button" value="提交" />
<p id="p1"></p>
</form>

</body>
</html>