Js read cookie method summary

This example summarizes the js method of reading cookies. Share with you for your reference. The specific implementation method is as follows:

In general, there are many methods for js to read cookies. The following instance function mainly USES the split function to split, and document.cookie gets all cookies and then USES for traversing all arrays to judge that if the cookie name is the same, then this cookie is what we are looking for.

Methods a

var acookie=document.cookie.split("; ");

function getck(sname)

{//Gets a single cookie 

for(var i=0;i<acookie.length;i++){

var arr=acookie[i].split("=");

if(sname==arr[0]){

if(arr.length>1)

return unescape(arr[1]);

else

return "";}}

return "";

}

Method 2

function getcookie(objname){//Gets the value of the cookie with the specified name 

var arrstr = document.cookie.split("; ");

for(var i = 0;i < arrstr.length;i ++){

var temp = arrstr[i].split("=");

if(temp[0] == objname) return unescape(temp[1]);

}

}

function   getcookie(cookiename){ 

var   cookiestring   =   document.cookie; 

var   start   =   cookiestring.indexof(cookiename   +   '= '); 

if   (start   ==   -1)   //    
 could not be found
return   null; 

start +=   cookiename.length   +   1; 

var   end   =   cookiestring.indexof( "; ",   start); 

if   (end   ==   -1)   return   unescape(cookiestring.substring(start)); 

return   unescape(cookiestring.substring(start,   end)); 

}

Methods four

function readcookie(name)   

{   

  var cookievalue = "";   

  var search = name + "=";   

  if(document.cookie.length > 0)   

  {    

    offset = document.cookie.indexof(search);   

    if (offset != -1)   

    {    

      offset += search.length;   

      end = document.cookie.indexof(";", offset);   

      if (end == -1) end = document.cookie.length;   

      cookievalue = unescape(document.cookie.substring(offset, end))   

    }   

  }   

  return cookievalue;   

}