//cookie过期
function eraseCookie(name) {
    createCookie(name, "", -1);
}

//读取cookie
function readCookie(name) {
    var nameEQ = name + "=";
    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, c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
    }
    return null;
}
//创建cookie
function createCookie(name, value, days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        var expires = "; expires=" + date.toGMTString();
    }
    else var expires = "";
    document.cookie = name + "=" + value + expires + "; domain=uzai.com;path=/";
}

function getURLRefer() {
    return document.referrer;
}

function getcurrentURL() {
    return location.href;
}

function saveURLReferToCookie() {
    var url = getURLRefer(); //上一次URL
    var cookiename = "uzaiURLRefer";
    var l = getcurrentURL(); //当前URL
    var resulturl=readCookie(cookiename)
    if(resulturl!=null&&resulturl!="")
	     return;
    if (l.indexOf("?sem") > 0) {
        createCookie(cookiename, l, 1);

    }
    else if (l.indexOf("source") > 0 && l.indexOf("panku") > 0) {
        createCookie(cookiename, l, 1);
    }
    else if (l.indexOf("source") > 0 && l.indexOf("uzai") > 0) {
        url = document.location.href;
        createCookie(cookiename, url, 1);
    } else if (l.indexOf("gclid") > 0) {
        if (url == "") {
            url = 'www.baidu.com'
            createCookie(cookiename, url + '--T', 1);
        }
    }
    else if (l.indexOf("laokehu") > 0) {
        if (url.indexOf("uzai") < 0) {
            createCookie(cookiename, url + '--L', 1);
        }
    }
    else if (l.indexOf("bdclkid") > 0) {
        if (url.indexOf("uzai") < 0) {
            if (url == "")
                url = 'www.google.com.hk'
            createCookie(cookiename, url + '--T', 1);
        }
    }
    else if (l.indexOf("haoid") > 0) {
        createCookie("haoid", l, 1);
    }
    else if (l.indexOf("edm=kuaiqian") > 0) {
        createCookie(cookiename, l, 1);
    }
    else if (url != "") {
            createCookie(cookiename, url, 1);
    }

}