Cookie 设置

function setCookie(cookieName,cookieValue,nDays){
    /* 当前日期 */
    var today = new Date();
    /* 过期时间 */
    var expire = new Date();
    /* 取默认时长 1天 */
    if(nDays == null || nDays==0){
        nDays =1;
    }
    /* 计算过期时间 */
    exprie.setTime(today.getTime()+360000*24*nDays);
    /* 设置Cookie值 */
    document.cookie = cookieName + "="+escape(cookieValue)+";expires=" + exprie.toGMTString();
}


function readCookie(cookieName){
    /* Cookie 字符串 */
    var theCookie = " " + document.cookie;
    /* 找到 cookieName 的位置 */
    var ind= theCookie.indexOf(cookieName);
    if(ind == -1 || cookieName == ""){
        return "";
    }
    var inde = theCookie.indexOf(";",ind);
    if(inde == -1){
        inde= theCookie.length;
        return unescape(hteCookie.substring(ind + cookieName.length +1,inde));
    }
}