如下所示：
<script type="text/javascript">
function layerLogin(gourl) {
if (0 < ey_getCookie('users_id')) {
alert('已经登录');
}else{
alert('请登录！');
}
}
function ey_getCookie(c_name)
{
return getCookie(c_name);
}
function getCookie(c_name)
{
if (document.cookie.length>0)
{
c_start = document.cookie.indexOf(c_name + "=")
if (c_start!=-1)
{
c_start=c_start + c_name.length+1
c_end=document.cookie.indexOf(";",c_start)
if (c_end==-1) c_end=document.cookie.length
return unescape(document.cookie.substring(c_start,c_end))
}
}
return "";
}
</script>标签：易优,end,name,getCookie,JS,start,cookie,document,CMS From： https://www.cnblogs.com/hwrex/p/18318851