cookie函数封装

 var  cookieUtil = {

            setCookie :function (cname, cvalue, exdays) {

                var exdate = new Date();

                exdate.setDate(exdate.getDate()+exdays);

                var expires =exdays?"expires="+exdate.toUTCString():"";

                document.cookie = cname + "=" + cvalue + "; " + expires + "; path=/;domain=.uborm.com.cn;";

            },

            getCookie:function (cname) {

                var name = cname + "=";

                var ca = document.cookie.split(';');

                for(var i=0; i<ca.length; i++) {

                    var c = ca[i];

                    while (c.charAt(0)==' ') c = c.substring(1);

                    if (c.indexOf(name) != -1) return c.substring(name.length, c.length);

                }

                return "";

            },

            clearCookie:function (name) {

                setCookie(name, "", -1);

            }

        }