试过一个=也行，为什么要两个==
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>confirm</title>
<script type="text/javascript">
function r(){
var mymessage=confirm("是女士吗");
if(mymessage=true)
{
document.write("你是女士!");
}
else
{
document.write("你是男士!");
}
}
</script>
</head>
<body>
<input name="button" type="button" onClick="r()" value="点击我，弹出确认对话框" />
</body>
</html>
