在首頁加載時隱藏字段，而不是在php發布后隱藏字段

Question

我希望第一次訪問index.php時可以隱藏某些字段的JavaScript。 選擇之后，會顯示一些字段（取決於選擇）。 但是在那個index.php上，有一種形式。 我按“提交”的那一刻，我想保留在同一頁面上，但是字段必須保持原樣。

但是現在我所有的字段都隱藏了（如第一頁加載時一樣）？

我的代碼：

        <script type="text/javascript">
        function firstLoad()
    {
    <!-- HIDE FIELDS ON DOC START -->
    $(".diameterRound").hide();
    $(".lengthSquare").hide();
    $(".lengthRectangle").hide();
    $(".material").hide();
    $(".thickness").hide();
    $(".calculate").hide();
    }
    window.onload=firstLoad;
    </script>

<form method="post" action="<?=$_SERVER['PHP_SELF'];?>">

....有人可以幫我嗎？ 我對javascript不太了解。

編輯我的腳本和表格：

    <script type="text/javascript">
    function firstLoad()
    {
    <!-- HIDE FIELDS ON DOC START -->
    $(".diameterRound").hide();
    $(".lengthSquare").hide();
    $(".lengthRectangle").hide();
    $(".material").hide();
    $(".thickness").hide();
    $(".calculate").hide();
    }
    $(document).ready(function()
    {
    <!-- GET SELECTED SHAPE -->
        $selectedshape=$("input:radio[name='shape']:checked").val();
        $('input[type="radio"]').click(function()
        {
            <!-- ROUND -->
            if($(this).attr("value")=="round")
            {
                $(".diameterRound").show();
                $(".material").show();
                $(".thickness").show();
                $(".calculate").show();
                $(".lengthSquare").hide();
                $(".lengthRectangle").hide();
                <!-- images shape selection goed zetten -->
                document.getElementById('roundShape').src = "css/images/roundSelect.jpg";
                document.getElementById('oblongShape').src = "css/images/oblong.jpg";
                document.getElementById('rectShape').src = "css/images/rect.jpg"
                document.getElementById('squareShape').src = "css/images/square.jpg";
            }
            <!-- SQUARE -->
            if($(this).attr("value")=="square")
            {
                $(".lengthSquare").show();
                $(".material").show();
                $(".thickness").show();
                $(".calculate").show();
                $(".diameterRound").hide();
                $(".lengthRectangle").hide();
                <!-- images shape selection goed zetten -->
                document.getElementById('roundShape').src = "css/images/round.jpg";
                document.getElementById('oblongShape').src = "css/images/oblong.jpg";
                document.getElementById('rectShape').src = "css/images/rect.jpg";
                document.getElementById('squareShape').src = "css/images/squareSelect.jpg";
            }
            <!-- RECTANGLE -->
            if($(this).attr("value")=="rectangle")
            {
                $(".lengthRectangle").show();
                $(".material").show();
                $(".thickness").show();
                $(".calculate").show();
                $(".lengthSquare").hide();
                $(".diameterRound").hide();
                <!-- images shape selection goed zetten -->
                document.getElementById('roundShape').src = "css/images/round.jpg";
                document.getElementById('squareShape').src = "css/images/square.jpg";
                document.getElementById('oblongShape').src = "css/images/oblong.jpg";
                document.getElementById('rectShape').src = "css/images/rectSelect.jpg"; 
            }
            <!-- OBLONG -->
            if($(this).attr("value")=="oblong")
            {
                $(".lengthRectangle").show();
                $(".lengthSquare").hide();
                $(".diameterRound").hide();
                <!-- images shape selection goed zetten -->
                document.getElementById('roundShape').src = "css/images/round.jpg";
                document.getElementById('squareShape').src = "css/images/square.jpg";
                document.getElementById('rectShape').src = "css/images/rect.jpg";
                document.getElementById('oblongShape').src = "css/images/oblongSelect.jpg";

            }
        });
    });
    window.onload=firstLoad;
    </script>

<form method="post" action="<?=$_SERVER['PHP_SELF'];?>">
                                <label>
                                    <h2>Step 1: Select your shape</h2>
                                </label>
                                <!-- SHAPE SELECTION -->
                                <div class="row 50%">
                                    <div class="3u 12u(mobilep)">
                                        <label>
                                            <input type="radio" name="shape" value="round" />
                                            <img id="roundShape" src="css/images/round.jpg">
                                        </label>
                                    </div>
                                    <div class="3u 12u(mobilep)">
                                        <label>
                                            <input type="radio" name="shape" value="square" />
                                            <img id="squareShape" src="css/images/square.jpg">
                                        </label>
                                    </div>
                                    <div class="3u 12u(mobilep)">
                                        <label>
                                            <input type="radio" name="shape" value="rectangle" />
                                            <img id="rectShape" src="css/images/rect.jpg">
                                        </label>
                                    </div>
                                    <div class="3u 12u(mobilep)">
                                        <label>
                                            <input type="radio" name="shape" value="oblong" />
                                            <img id="oblongShape" src="css/images/oblong.jpg">
                                        </label>
                                    </div>
                                </div>
                                <!-- ROUND - DIAMETER -->
                                <div class="row 50% diameterRound">
                                    <div class="12u diameterRound">
                                        <input type="text" name="diameterRound" class="diameterRound" id="diameterRound" placeholder="Diameter (mm)" />
                                    </div>
                                </div>
                                <!-- SQUARE - LENGTH -->
                                <div class="row 50% lengthSquare">
                                    <div class="12u lengthSquare">
                                        <input type="text" name="lengthSquare" class="lengthSquare" id="lengthSquare" placeholder="Length (mm)" />
                                    </div>
                                </div>  
                                <!-- RECTANGLE OBLONG - LENGTH WIDTH -->
                                <div class="row 50% lengthRectangle">
                                    <div class="6u lengthRectangle">
                                        <input type="text" name="lengthRectangle" class="lengthRectangle" id="lengthRectangle" placeholder="Length (mm)" />
                                    </div>
                                    <div class="6u">
                                        <input type="text" name="widthRectangle" class="widthRectangle" id="widthRectangle" placeholder="Width (mm)" />
                                    </div>
                                </div>
                                <div class="row 50% material">
                                    <div class="12u material">
                                        <select class="material" name="material" id="material"  >
                                            <option value="" disabled selected>Select your material</option>
                                            <OPTION value="448.38">Mild steel = 45 kg/mm2</OPTION>
                                            <OPTION value="797.12">Stainless steel A4316 = 80 kg/mm2</OPTION>
                                            <OPTION value="523.11">Stainless steel 304 = 52.5 kg/mm2</OPTION>
                                            <OPTION value="199.28">Aluminium = 20 kg/mm2</OPTION>
                                            <OPTION value="1394.96">Hardox 450 = 140 kg/mm2</OPTION>
                                            <OPTION value="1245.50">Raex 400 = 125 kg/mm2</OPTION>
                                            <OPTION value="348.74">Copper = 35 kg/mm2</OPTION>
                                            <OPTION value="548.02">50D Steel = 55 kg/mm2</OPTION>
                                            <OPTION value="617.77">Domex 420 = 62 kg/mm2</OPTION>
                                            <OPTION value="637.69">S355 structual steel  = 64 kg/mm2</OPTION>                                                       
                                        </select>
                                    </div>
                                </div>
                                <div class="row 50% thickness">
                                    <div class="12u thickness">
                                        <input type="text" name="thickness" class ="thickness" id="thickness" placeholder="Thickness of the material (mm)"  />  
                                    </div>
                                </div>                          
                                <div class="row 50% calculate">
                                    <div class="12u calculate">
                                    <label>
                                        <ul class="actions calculate">
                                            <li><input id="calculate" type="submit" class="button alt" value="Calculate" /></li>
                                        </ul>
                                    </label>
                                    </div>
                                </div>
                        </form>

Answer 1

默認情況下，您可以通過將其CSS設置為display來隱藏它們：無

Answer 2

在這里，您提交的頁面沒有ajax，因此當您提交表單時，它將重新加載頁面並再次執行。 在這里firstLoad（）函數再次調用，它將隱藏元素。

解

使用ajax進行表單提交。 ajax不會重新加載頁面，因此您的元素與選擇的外觀相同

要么

根據提交的發布數據為隱藏元素設置一些條件。