Cookie的读写删

sName:字符串 Cookie名

sValue:字符串 Cookie值

oExpires:日期 Cookie过期时间

sDomain:字符串 特定域名下的Cookie

bSecure:布尔型 Cooke的Secure属性，为true就只能通过HTTP或其他安全协议来传输

提示：设置了secure属性，只保证cookie与Web服务器之间的数据传输过程加密，而保存在本地的cookie文件并不加密

 

 

function setCookie(sName, sValue, oExpires, sPath, sDomain, bSecure) {
                    var sCookie = sName + "=" + encodeURIComponent(sValue);
                
                    if (oExpires) {
                        sCookie += "; expires=" + oExpires.toGMTString();
                    }
                
                    if (sPath) {
                        sCookie += "; path=" + sPath;
                    }
                
                    if (sDomain) {
                        sCookie += "; domain=" + sDomain;
                    }
                
                    if (bSecure) {
                        sCookie += "; secure";
                    }
                
                    document.cookie = sCookie;
                }
                                
                function getCookie(sName) {
                
                    var sRE = "(?:; )?" + sName + "=([^;]*);?";
                    var oRE = new RegExp(sRE);
                    
                    if (oRE.test(document.cookie)) {
                        return decodeURIComponent(RegExp["$1"]);
                    } else {
                        return null;
                    }
                
                }                

                function deleteCookie(sName, sPath, sDomain) {
                    var sCookie = sName + "=; expires=" + (new Date(0)).toGMTString();
                    if (sPath) {
                        sCookie += "; path=" + sPath;
                    }
                
                    if (sDomain) {
                        sCookie += "; domain=" + sDomain;
                    }
                    
                    document.cookie = sCookie;
                }