// get data of the url
function getData (parm) {
    var url = window.location.href
    var queryStart = url.indexOf("?") + 1,
        queryEnd   = url.indexOf("#") + 1 || url.length + 1,
        query = url.slice(queryStart, queryEnd - 1),
        pairs = query.replace(/\+/g, " ").split("&"),
        parms = {}, i, n, v, nv

    if (query === url || query === "") return

    for (i = 0; i < pairs.length; i++) {
        nv = pairs[i].split("=", 2)
        n = decodeURIComponent(nv[0])
        v = decodeURIComponent(nv[1])

        if (!parms.hasOwnProperty(n)) parms[n] = []
        parms[n].push(nv.length === 2 ? v : null)
    }
    return parms[parm]
}