js设置以及取cookie的方法

//取得cookie值

function getCookie(name,defaultVlaue) {
  var allcookies= document.cookie;
  var pos = allcookies.indexOf(name+"=");
  if(pos != -1) {
   var start = pos+name.length+1
   var end = allcookies.indexOf(";",start);
   if(end==-1){
    end = allcookies.length;
   }
   var value = allcookies.substring(start,end);
   return value;;
  } else {
   return defaultVlaue;
  }
 }
 

//设置cookie值
 function setCookie(name,value) {
  document.cookie = name+"="+value;
 }