设置cookie

function setCookie(sName,sValue,iDay)
{
    iDay=iDay||0;
    var oDate=new Date();
    oDate.setDate(oDate.getDate()+iDay);
documeny.cookie=sname+‘=‘+sValue+‘; expires=‘+oDate;          
}

function getCookie(sName)
    {
        var arr=document.cookie.split(‘; ‘);
        for (var i=0; i<arr.length; i++)
        {
            var aTmp=arr[i].split(‘=‘);
            if (aTmp[0] == sName)
            {
                return aTmp[1];
            }
        }
    }

removeCookie(‘name‘);
    
    function removeCookie(sName)
    {
        setCookie(sName, ‘‘, -1);
    }
    
    alert(document.cookie);