■No15_JavaScript Cookieの読み書き

【Cookieの書き込み】
document.cookie='searchCode=値';

【Cookieの読み込み】
function cookie_road(){
　article = document.cookie + ";";
　data_n = article.indexOf("searchCode",0);
　if(data_n!=-1){
  　data2 = article.substring(data_n,article.length);
  　start = data2.indexOf("=",0)+1;
  　end = data2.indexOf(";",0);
  　code = data2.substring(start,end);
　}else{
　　code="";
 }
 return code;
}