Как очистить URL через JavaScript?

var url = window.location.pathname.split('/')[1];
    console.log(url);
    var res;
    switch (url) {
        case 'extern' : res = 'extern';break;
        case 'elektronnaya-podpis' : res = 'uc';break;
        case 'diadoc' : res = 'diadoc';break;
        case 'sverka-nds' : res = 'sverka';break;
        case 'puls' : res = 'puls';break;
        case 'focus' : res = 'focus';break;
        case 'buhgalteria' : res = 'buh';break;
        case 'zakupki' : res = 'zakupki';break;
        case 'normativ' : res = 'normativ';break;
        case 'elba' : res = 'elba';break;
        case 'expert' : res = 'expert';break;
        case 'market' : res = 'market';break;
        case 'ofd' : res = 'ofd';break;
        case 'fms' : res = 'fms';break;
        case 'declarant' : res = 'declarant';break;
        case 'prizma' : res = 'prizma';break;
        case 'alcodeclaration' : res = 'alcodeclaration';break;
        case 'alcosverka' : res = 'alcosverka';break;
        case 'rpn' : res = 'rpn';break;
        case 'hotel' : res = 'hotel';break;
        case 'mercury' : res = 'mercury';break;
        default : res = 'other';
    }
    $(".custom_select_crm").closest("form.wpcf7-form").find('input[name="product"]').val(res);