Change Url Params JS

gistfile1.txt

/** ====================  GET URL PARAMS AS OBJECT ==================== **/
urlGetParams = function(sParams){

    var sHash = sParams|| window.location.hash,
        result = {};

    sHash.substring(sHash.indexOf('?') + 1).split('&').forEach(function(el) {
        var kv = el.split('=');
        result[kv[0]] = decodeURIComponent(kv[1]);
    });

    return result;

};

/** ====================  TEST IF URL HAS PARAMS ==================== **/

urlHasQuery = function( url ){
    var sURL = url || window.location.href;
    return sURL.indexOf('?') != -1;
};


/** ====================  HASH WITHOUT PARAMS ==================== **/

urlHashWithoutParams = function( url ){
    var sURL = url ? url.substring(url.indexOf('#') + 1) : window.location.hash;
    return sURL.split('?')[0];
};


/** ====================  CHANGE URL PARAMS ==================== **/

urlChangeParams = function(oParams /* Object of params (Key/Value pair) to change */, aRemoveParams /* Array of params to remove */ ) {

    var newURL = window.location.hash;

    if ( oParams instanceof Object ) {
        //Replace Regex
        for(var key in oParams) {
            if(oParams.hasOwnProperty(key)){
                var matchRegEx = new RegExp( "(&|\\?)" + key + "(=[^&]*)?|^" + key + "(=[^&]*)?&?" , "g"),
                    match = newURL.match(matchRegEx);
                if(match && match.length > 0 && match[0] != ""){
                    newURL = newURL.replace(matchRegEx, "&" + key + "=" + oParams[key]);
                }else{
                    newURL += ('&' + key + '=' + oParams[key]);
                }
            }
        }
    }

    if( aRemoveParams instanceof Array ){
        //Remove Regex
        for(var r = 0, rLen = aRemoveParams.length; r < rLen; r++) {
            var removePattern = "(&|\\?)" + aRemoveParams[r] + "(=[^&]*)?|^" + aRemoveParams[r] + "(=[^&]*)?&?",
                removeRegEx   = new RegExp(removePattern, "g");
            newURL = newURL.replace(removeRegEx,'');
        }
    }

    window.location.hash = newURL.replace(/(\?|&)$/,''); //replace any empty params with nothing

};