"display:none"的元素仍然可见

Question

正如我在主题中提到的那样,即使我将样式设置为不显示下面给出的代码的特定部分,它仍然出现在页面上.我应该将代码的一部分包含在一个单独的表中吗？请提出您可能遇到的问题的建议.

<div id="submit">
<table
    style="font-family: 'Lucida Sans Unicode', 'Lucida Grande', sans-serif"
    ; border="0" cellpadding="5" cellspacing="0" align="center">

    <form id="frm" name="frm" action="http://app1/submitProxy.php"
        method="POST" enctype="multipart/form-data">
        <tr>
            <th colspan="2" bgcolor="#004276"><font color="white">
                    Submit a File 
            </th>
        </tr>
        <tr>
            <td>File:</td>
            <td><input name="upfile" type="file" value="">
            </td>
        </tr>
        <input type="hidden" name="email" readonly="readonly"
            value="<%=user.getUserName()%>" /> <input type="hidden"
            name="reanalyze" value="true" />
        <tr>
            <td>Case or Reference Number:</td>
            <td><input type="text" name="caseno" value="${caseno}" /></td>
        </tr>
<%--            <tr>
            <td>Date acquired:</td>
            <td><input type="text" name="acq" id="acq" readonly="readonly"
                value="${document.frm.acq}" /><strong><a href="#"
                    onclick="cal1.select(document.frm.acq,'anchor1','MM/dd/yyyy'); return false;"
                    title="cal1.select(document.frm.acq,'anchor1','MM/dd/yyyy'); return false;"
                    name="anchor1" id="anchor1"><font face="Helvetica,sans-serif">
                            SELECT</font> </a> </strong></td>
        </tr>
        <tr>
            <td>Type of system acquired from:</td>
            <td><input type="text" name="systemAcquired"
                value="${systemAcquired}" /></td>
        </tr> --%>
        <tr>
            <td>Obtained via:</td>
            <td></td>
        </tr>
        <tr>
            <td><dd>Search Warrant:</dd></td>
            <td><input type="checkbox" name="searchWarrant"
                onclick="showhidefield()" value="Y">
            </td>
        </tr>
<div id='hideablearea' style='display: none;'>
    <tr>
            <td>Search Warrant Number:</td>
            <td><input name="searchWarrantNumber" type="text"
                value="${searchWarrantNumber}" /> <br />
            </td>
        </tr>
        <tr>
            <td>Jurisdiction:</td>
            <td><input name="jurisdiction" type="text"
                value="${jurisdiction}" /> <br />
            </td>
        </tr>
        </div>
    <tr>
        <td><dd>Grand Jury:</dd></td>
        <td><input type="checkbox" name="grandJury" value="Y"
            onclick="checkGrandJury()">
        </td>
    </tr>
    <tr>
        <td><dd>Found in the wild:</dd>
        </td>
        <td><input type="checkbox" name="foundInTheWild" value="Y"
            onclick="checkFoundInTheWild()">
        </td>
    </tr>
    <tr>
        <td><dd>Email:</dd></td>
        <td><input type="checkbox" name="obtainedEmail" value="Y"
            onclick="checkObtainedEmail()">
        </td>
    </tr>
    <tr>
        <td><dd>Other:</dd></td>
        <td><input type="checkbox" name="obtainedOther" value="Y"
            onclick="checkObtainedOther()">
        </td>
    </tr>
    <tr>
        <td>Environment:</td>
        <td><select name="sandboxes[]" size="1">
                <option value="00-0C-29-CF-B8-A6">VMSB1 - Windows 7</option>
                <option value="00-0C-29-0A-AB-9A">VMSB2 - Windows XP</option>
        </select>
        </td>
    </tr>
    <tr>
        <td>Comments:</td>
        <td><textarea name="notes">Add comments here...</textarea><br>

        </td>
    </tr>
    <td colspan="2">
        <center>
            <input type="submit" name="button" value="Submit"
                onclick="onSubmit()" />
        </center>
    </td>
    </form>
</table>
</div>

Answer 1

TR之间的DIV是无效的HTML.在TR本身上放置"display:none".

      </tr>
<div id='hideablearea' style='display: none;'>   <----- invalid
    <tr>