var str = location.href;//获取完整的url
var cateid = str.substring(81);//取到id

switch(cateid) {
                    case ‘17‘:
                        $(‘#tab4‘).tab({
                            defaultIndex: 0,
                            activeClass: "tab-blue "
                        });
                        break;
                    case ‘18‘:
                        $(‘#tab4‘).tab({
                            defaultIndex: 1,
                            activeClass: "tab-blue "
                        });
                        break;
                    case ‘19‘:
                        $(‘#tab4‘).tab({
                            defaultIndex: 2,
                            activeClass: "tab-blue "
                        });
                        break;
                    case ‘20‘:
                        $(‘#tab4‘).tab({
                            defaultIndex: 3,
                            activeClass: "tab-blue "
                        });
                        break;
                    case ‘21‘:
                        $(‘#tab4‘).tab({
                            defaultIndex: 4,
                            activeClass: "tab-blue "
                        });
                        break;

                }