function removeHash() {
    var scrollV, scrollH, loc = window.location;
    if ("pushState" in history)
        history.pushState("", document.title, loc.pathname + loc.search);
    else {
        // Prevent scrolling by storing the page's current scroll offset
        scrollV = document.body.scrollTop;
        scrollH = document.body.scrollLeft;
        loc.hash = "";
        // Restore the scroll offset, should be flicker free
        document.body.scrollTop = scrollV;
        document.body.scrollLeft = scrollH;
    }
}
function urlHash()
{
    var hashIndex = document.URL.indexOf("#");
    if(hashIndex > 0)
        return document.URL.substr(document.URL.indexOf('#')+1);
    return "";
};
function getHashParams() {
    var hashUrl = urlHash();
    if(hashUrl == '') {
        return {};
    }
    var pieces = hashUrl.split("&"), data = {}, i, parts;
    // process each query pair
    for (i = 0; i < pieces.length; i++) {
        parts = pieces[i].split("=");
        if (parts.length < 2) {
            parts.push("");
        }
        data[decodeURIComponent(parts[0])] = decodeURIComponent(parts[1]);
    }
    return data;
}
function setHashParams(data) {
    var hashUrl = '';
    Object.keys(data).forEach(function(key, index) {
        if(index > 0) {
            hashUrl = hashUrl + "&";
        }
        hashUrl = hashUrl + key.toString() + "=" + data[key].toString();
    }, data);
    if (hashUrl.length > 0) window.location.hash = hashUrl;
    else removeHash();
}
function ChangeUrlHashParam(paramName, value) {
    var params = getHashParams();
    params[paramName] = value;
    setHashParams(params);
}
function GetUrlHashParam(paramName) {
    var params = getHashParams();
    return params[paramName];
}
function DeleteUrlHashParam(paramName) {
    var params = getHashParams();
    if(!params[paramName])
        return;
    delete params[paramName];
    setHashParams(params);
}
function RemoveAllUrlHashes()
{
    var uri = window.location.toString();
    if (uri.indexOf("#") > 0) {
        var cleanUri = uri.substring(0, uri.indexOf("#"));
        window.history.replaceState({}, document.title, cleanUri);
    }
}