function primary_recommend() {
    console.log("enter primary_recommend!!!");
    let pfloor = document.getElementById('u285_input').value;
    let pceiling = document.getElementById('u288_input').value;
    let Q1 = Array(pfloor, pceiling);
    let Q2 = $('input:radio[name=q2]:checked').val();
    let Q3 = $('input:radio[name=q3]:checked').val();
    let Q4 = $('input:radio[name=q4]:checked').val();
    let Q5 = document.getElementById('u290_input').value;
    if (!pceiling || !pfloor || !Q1 || !Q2 || !Q3 || !Q4 || !Q5){
        alert("请先完成所有问题再提交！");
        return false;
    }
    if (pfloor < 1500){
        alert("预算不得低于1500！");
        return false;
    }
    if (pceiling > 150000){
        alert("预算不得高于150000！");
        return false;
    }
    if (pfloor >= pceiling){
        alert("价格下限（数字）只能低于上限（数字）！");
        return false;
    }
    if (Q5%0.25 !== 0){
        alert("您输入的硬盘容量总需求（数字）不是0.25倍数！");
        return false;
    }
    let primary_data = {'version':'primary', 'Q1' : Q1, 'Q2' : Q2, 'Q3' : Q3, 'Q4' : Q4, 'Q5' : Q5};
    if (confirm("已填写完成，是否确认提交？")===true){
        $.ajax({
            type : "post",
            url : "controllers/recommendController.php",
            data : primary_data,
            dataType : 'json',
            success : function (result){
                window.sessionStorage.setItem("recommendResult", JSON.stringify(result));
                if (result['flag'] === 1)
                    window.location.href = "qresult0.html";
                else if (result['count'] === 1)
                    window.location.href = "qresult1.html";
                else if (result['count'] === 2)
                    window.location.href = "qresult2.html";
                else // count = 3
                    window.location.href = "qresult3.html";
            }
        });
    }



}