export function setCookie(c_name,value,expire) {
 var date=new Date()
 date.setSeconds(date.getSeconds()+expire)
 document.cookie=c_name+ "="+escape(value)+"; expires="+date.toGMTString()
 //console.log(document.cookie)
}
 
export function getCookie(c_name){
 if (document.cookie.length>0){
  let c_start=document.cookie.indexOf(c_name + "=")
  if (c_start!=-1){ 
   c_start=c_start + c_name.length+1 
   let c_end=document.cookie.indexOf(";",c_start)
   if (c_end==-1) c_end=document.cookie.length
    return unescape(document.cookie.substring(c_start,c_end))
   } 
  }
 return ""
}
 
export function delCookie(c_name){
 setCookie(c_name, "", -1)
}

// 将用户名存进cookie，第三个参数60为秒，意味着一分钟后cookie自动消失。一天为 86400 s
 this.$cookieStore.setCookie( 'username' ,this.username,60);