js 中怎么输出 "" 我试了 \"\" 不好使，还有等于号 =
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gbk" />
<title>声明变量</title>
<script type="text/javascript">
mya=\"+" "+\" ;
alert(mya);
</script>
</head>
<body>
</body>
</html>
