te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>css - Javascript: style.display:'block' doesn't work - Stack Overflow

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    css - Javascript: style.display:'block' doesn't work - Stack Overflow

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    any idea why this JavaScript just shows "block" and not the content of the (hidden) DIV?

    <html>
<body>

<div id="mydiv" style="display:none">TEST</div>

<a href="javascript:document.getElementById('mydiv').style.display='block';">Show my DIV</a>

</body>
</html>

    I also tried 'inline' but with the same result.

    return false/true also failed.

    onclick='' also failed.

    I know there is style.visibility etc. but i need none/block.

    Also the function should work inside the link, i don't want to call an external JS-function.

    Thanks!

    any idea why this JavaScript just shows "block" and not the content of the (hidden) DIV?

    <html>
<body>

<div id="mydiv" style="display:none">TEST</div>

<a href="javascript:document.getElementById('mydiv').style.display='block';">Show my DIV</a>

</body>
</html>

    I also tried 'inline' but with the same result.

    return false/true also failed.

    onclick='' also failed.

    I know there is style.visibility etc. but i need none/block.

    Also the function should work inside the link, i don't want to call an external JS-function.

    Thanks!

    • javascript
    • css
    Share Improve this question asked May 25, 2014 at 19:55 Roman TischRoman Tisch 2173 gold badges4 silver badges13 bronze badges 0
    Add a ment  | 

    5 Answers 5

    Reset to default 5

    Because you want to use an onclick event handler, not the href attribute:

    <a href="#" onclick="document.getElementById('mydiv').style.display='block';">Show my DIV</a>

    jsFiddle example

    (side note: inline JavaScript is usually frowned upon)

    The value of the javascript expression

    document.getElementById('mydiv').style.display='block'

    is the string 'block' - think of the way you can do a=b='something' - in javascript the value of an assignment expression is the assigned value.

    If you try

    <a href="javascript:'howdy'">link</a>

    You'll find clicking the link navigates to a document containing just the word howdy - and the same thing is happening with your code. You can stop this happening by adding an explicit void(0), or by wrapping the code in an immediately-invoked function expression that doesn't return a value (i.e. implicitly returns undefined), so:

    <a href="javascript:(function(){document.getElementById('mydiv').style.display='block';})()">

    (This structure is monly used in bookmarklets). However, as several ments have already pointed out, in general the use of javascript: hrefs is frowned upon, and you should consider using event handling instead.

    This code describes your problem: http://jsbin./jigiy/1

    <div id="mydiv" style="display:none">TEST</div>
<a href="javascript:document.getElementById('mydiv').style.display='block',false;">Show my DIV</a>

    Why is this happening:

    Javascript setters return the value input, so document.getElementById('mydiv').style.display='block' will return 'block', which is equal to href="javascript:'block'". Now it refers to about:blank and sets its content to block.

    I'm not sure why the browsers refer and set the content of about:blank, but i think this has something to do with data-urls.

    Test this:

    <html>
<body>

<div id="mydiv" style="display:none">TEST</div>

<span onclick="document.getElementById('mydiv').style.display = 'block'">Show my DIV</span>

</body>
</html>

    -> my problem was using this method to display html tag:

    const helloDiv = document.getElementById('hello')
helloDiv.style.display = "block"

    -> the solution was to replace html tag:

    document.getElementById('hello').style.display = "block"

    and it worked for me

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