Set and Get Param Url

SetGetParamUrl.js

var getParam = function (param) {
    var url = window.location.search.substring(1),
        params = url.split("&"),
        val = '';
    $.each(params, function (i, v) {
        var pair = v.split("=");
        if (pair[0] == param) {
            val = pair[1];
        }
    });
    return decodeURI(val);
},

/***
 * @desc Updates of URL parameters
 * @param data
 * @param data.param
 * @param data.value
 */
setParam = function (data) {
    var getUrl = document.location.search.substr(1).split('&'),
        url = document.location.href.split('?');
    data.value = encodeURI(data.value);
    if (getUrl[0] != '') {
        var flag_update = false;
        $.each(getUrl, function (i, v) {
            var k = v.split('=');
            if (k[0] == data.param) {
                flag_update = true;
                k[1] = data.value;
                getUrl[i] = k.join('=');
            }
        });
        if (flag_update == false) {
            getUrl[getUrl.length] = [data.param, data.value].join('=');
        }
    } else {
        getUrl[0] = [data.param, data.value].join('=');
    }
    window.history.pushState(null, null, url[0] + '?' + getUrl.join('&'));
},