新手问一个简单的问题！！

用checkbox中的checked属性即可<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<Script>
  function t1()
  {
if (Check1.checked) alert('Checked');
  else alert('not Checked');
  }
</Script>
</HEAD><BODY>
<input id="Check1" type="checkbox">
<br><input type="Button" value="Button" onclick="t1()">
</BODY>
</HTML>