一天一個js（10）cookie操作，寫cookie，讀取cookie，刪除cookie

[javascript]
//寫Cookie參數：CKname是cookie名稱(必填),CKvalue是cookie值(必填),duration是到期時間(預設為關閉瀏覽器),CKpath是可訪問cookie的目錄(預設為所有頁面),CKdomain是可訪問cookie的主機名稱(預設為當前網域名稱下[子網域名稱]);  
function setCookie(CKname,CKvalue,duration,CKpath,CKdomain){ 
    var NewDate = new Date(); 
    NewDate.setTime(NewDate.getTime()+duration*24*60*60*1000); 
    document.cookie = CKname+"="+escape(CKvalue)+(duration?";expires="+NewDate.toGMTString():"")+(CKpath?";path="+CKpath:"")+(CKdomain?";domain="+CKdomain:""); 
}; 
//讀取指定名稱的cookie  
function getcookie(CKname){ 
    var arrCookie = document.cookie.match(new RegExp("(^| )"+CKname+"=([^;]*)(;|$)")); 
    if(arrCookie!=null){ 
        return unescape(arrCookie[2]); 
    }else{ 
        return null; 
    }; 
}; 
//刪除指定名稱的cookie  
function deleteCookie(CKname){ 
    document.cookie = CKname+"=;expires="+(new Date(0)).toGMTString(); 
}; 

//寫Cookie參數：CKname是cookie名稱(必填),CKvalue是cookie值(必填),duration是到期時間(預設為關閉瀏覽器),CKpath是可訪問cookie的目錄(預設為所有頁面),CKdomain是可訪問cookie的主機名稱(預設為當前網域名稱下[子網域名稱]);
function setCookie(CKname,CKvalue,duration,CKpath,CKdomain){
 var NewDate = new Date();
 NewDate.setTime(NewDate.getTime()+duration*24*60*60*1000);
 document.cookie = CKname+"="+escape(CKvalue)+(duration?";expires="+NewDate.toGMTString():"")+(CKpath?";path="+CKpath:"")+(CKdomain?";domain="+CKdomain:"");
};
//讀取指定名稱的cookie
function getcookie(CKname){
 var arrCookie = document.cookie.match(new RegExp("(^| )"+CKname+"=([^;]*)(;|$)"));
 if(arrCookie!=null){
  return unescape(arrCookie[2]);
 }else{
  return null;
 };
};
//刪除指定名稱的cookie
function deleteCookie(CKname){
 document.cookie = CKname+"=;expires="+(new Date(0)).toGMTString();
};