javascript - 在JavaScript中设置多个Cookie

我正在尝试在document.cookie中设置多个cookie，但是不幸的是，我的代码将cookie值显示为null和undefined。我的代码如下：

<script>
function set_cookie ( name, value, exp_y, exp_m, exp_d, path, domain, secure )
{
  var cookie_string = name + "=" + escape ( value );

  if ( exp_y )
  {
    var expires = new Date ( exp_y, exp_m, exp_d );
    cookie_string += "; expires=" + expires.toGMTString();
  }

  if ( path )
        cookie_string += "; path=" + escape ( path );

  if ( domain )
        cookie_string += "; domain=" + escape ( domain );

  if ( secure )
        cookie_string += "; secure";

  document.cookie = cookie_string;
}
</script>
<script>

alert(setCookie( "username", "Miron" ));
alert(setCookie( "username", "Mirion", 2003, 01, 15 ));
alert(setCookie("username", "John Smith", 2003, 01, 15, "","elated.com", "secure"))
</script>

从技术上讲，我认为代码没有错误。请告诉我我哪里出了问题

最佳答案

尝试将字符串return更改为display in alert，并将函数名称set_cookie更改为setCookie。

 <script>
function setCookie ( name, value, exp_y, exp_m, exp_d, path, domain, secure )
{
  var cookie_string = name + "=" + escape ( value );

  if ( exp_y )
  {
    var expires = new Date ( exp_y, exp_m, exp_d );
    cookie_string += "; expires=" + expires.toGMTString();
  }

  if ( path )
        cookie_string += "; path=" + escape ( path );

  if ( domain )
        cookie_string += "; domain=" + escape ( domain );

  if ( secure )
        cookie_string += "; secure";

  document.cookie = cookie_string;
  return cookie_string;//or document.cookie
}
</script>


 <script>

alert(setCookie( "username", "Miron" ));
alert(setCookie( "username", "Mirion", 2003, 01, 15 ));
alert(setCookie("username", "John Smith", 2003, 01, 15, "","elated.com", "secure"))
</script>