function setCookie(name, value, props) {
    props = props || {}
    var exp = props.expires
    if (typeof exp == "number" && exp) {
        var d = new Date()
        d.setTime(d.getTime() + exp*1000)
        exp = props.expires = d
    }
    if(exp && exp.toUTCString) { props.expires = exp.toUTCString() }
    value = encodeURIComponent(value)
    var updatedCookie = name + "=" + value
    for(var propName in props){
        updatedCookie += "; " + propName
        var propValue = props[propName]
        if(propValue !== true){ updatedCookie += "=" + propValue }
    }
    document.cookie = updatedCookie
}

function deleteCookie(name) {
    setCookie(name, null, { expires: -1 })
}