//設定快取
function set_cache(key,value){
    if(key=='') return false;
    localStorage.setItem(key, value);
}

//讀取快取
function get_cache(key){
    return localStorage.getItem(key);
}

//刪除快取
function remove_cache(key){
    localStorage.removeItem(key);
}

//寫入cookie
function setCookie(name,value){
    var
 
 Days = 30;
    var exp = new Date();
    exp.setTime(exp.getTime() + Days*24*60*60*1000);
    document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}

//獲取cookie
function getCookie(name){
    var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
    if(arr=document.cookie.match(reg)
 
)
    return unescape(arr[2]);
    else
    return null;
}

//刪除cookie
function delCookie(name){
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval=getCookie(name);
    if(cval!=null)
    document.cookie= name + "="+cval+";expires="+exp.toGMTString();
}