/**
Cookie类
*/
function Cookie() {
    /**
　　@desc 设置Cookie
　　@return void
　　*/
    this.setCookie = function(name, value, hours) {

        var expire = "";
        if (hours != null) {
            expire = new Date((new Date()).getTime() + hours * 3600000);
            expire = "; expires=" + expire.toGMTString();
        }
        document.cookie = escape(name) + "=" + escape(value) + expire;
    }
    /**
　　@desc 读取Cookie
　　@return String
　　*/
    this.getCookie = function(name) {
        var cookieValue = "";
        var search = escape(name) + "=";
        if (document.cookie.length > 0) {
            offset = document.cookie.indexOf(search);
            if (offset != -1) {
                offset += search.length;
                end = document.cookie.indexOf(";", offset);
                if (end == -1) end = document.cookie.length;
                cookieValue = unescape(document.cookie.substring(offset, end))
            }
        }
        return cookieValue;
    }
}