JS encapsulated cookie operation function examples (setting, reading, deleting)_javascript skills

The example in this article describes the JS encapsulated cookie operation function. Share it with everyone for your reference, the details are as follows:

/*设置cookie*/
function setCookie(name, value, iDay)
{
  var oDate=new Date();
  oDate.setDate(oDate.getDate()+iDay);
  document.cookie=name+'='+value+';expires='+oDate;
};
/*使用方法：setCookie('user', 'simon', 11);*/
/*获取cookie*/
function getCookie(name)
{
  var arr=document.cookie.split('; '); //多个cookie值是以; 分隔的，用split把cookie分割开并赋值给数组
  for(var i=0;i<arr[i].length;i++) //历遍数组
  {
    var arr2=arr[i].split('='); //原来割好的数组是：user=simon，再用split('=')分割成：user simon 这样可以通过arr2[0] arr2[1]来分别获取user和simon 
    if(arr2[0]==name) //如果数组的属性名等于传进来的name
    {
      return arr2[1]; //就返回属性名对应的值
    }
    return ''; //没找到就返回空
  }
};
/*使用方法：getCookie('user')*/
/*删除cookie*/
function removeCookie(name)
{
  setCookie(name, 1, -1); //-1就是告诉系统已经过期，系统就会立刻去删除cookie
};
/*使用方法：removeCookie('user')*/

I hope this article will be helpful to everyone in JavaScript programming.