js判断cookie 是否存在

Question

<a target="_blank" href="http://down.123.com/abc.pdf">下载PDF</a>
访问此HTML 这个连接 JS判断如果存在此COOKIE 直接下载 http://down.123.com/abc.pdf 如不存在提示您还没注册,点确定后跳转到
http://www.123.com/reg.html
cookie名称:
abc_2010_cookie

Answer 1

<a target="_blank" href="http://down.123.com/abc.pdf" onclick="return chkcookies()">下载PDF</a>
<script>
function chkcookies()
{
var NameOfCookie="abc_2010_cookie";
var c = document.cookie.indexOf(NameOfCookie+"=");
if (c != -1)
{
return true;
}
else
{
alert("您还没注册");
location.href="http://www.123.com/reg.html";
}
return false;
}
</script>本回答被提问者采纳