cookiesを取る

function listCookies(){
   var items = new Array();
   var cookies = document.cookie.split(";");
   for(var i = 0; i < cookies.length; i++){
       var pairs = cookies[i].split("=");
       items[pairs[0]] = pairs[1];
   }   
   return items;
} 

function getCookie(key){
   var regExp = new RegExp(key + "=([^=;]+)");
   if(regExp.exec(document.cookie)){
       return RegExp.$1;
   }else{
       return "";
   }
}

function printArr(arr){
   for(var e in arr){
       document.write(e + ":" + arr[e] + "<br />");
   }
}





printArr(listCookies());
document.write(getCookie("today"));