JS读取写入删除COOKIE的各种操作

1. .NET后置代码中获取

Response.Redirect("http://www.baidu.com?id=" +Request.Cookies["size"].Value);

2. js中写入cookie

function setCookie(name,value)
{
 var Days = 30;
 var exp = new Date();
 exp.setTime(exp.getTime() + Days*24*60*60*1000);
 document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
document.cookie = "size="+escape (self.text() )+";path=/";
}

3. js中获取cookie

function getCookie(name)
{
 var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");

 if(arr=document.cookie.match(reg))

  return (arr[2]);
 else
  return null;
}

4. js中删除cookies

function delCookie()
{
   //获取当前时间
    var date = new Date();
    //将date设置为过去的时间
    date.setTime(date.getTime() - 10000);
    //将userId这个cookie删除
    document.cookie = "cookieName=0; expires=" + date.toGMTString();
}