请问调用JS 点击SPAN 代码该怎么写请教

Posted 2023-04-29

代码是：<SPAN class=publish>发布</SPAN>

请问调用js以 发布 为基准 点击 ，该怎么写？
请问调用js以 class=publish 为基准 点击 ，该怎么写？

参考技术A // 以 发布 为基准

var spans = document.querySelectorAll("span");
for(var i =0;i<spans.length;i++)
    var si = spans[i];
    if(si.innerhtml == "发布")
        si.onclick = function()
            // TODO
        
    


// 以 class=publish 为基准
var spans = document.querySelectorAll("span.publish");
for(var i = 0;i<spans.length;i++)
    spans[i].onclick=function()
        // TODO
    

追问

不好意思 您的代码测试不成功，好像一定要 javascript 代码才能调用，我把他们改成一行后，把您的代码放进去后没反应

追答

是不是你添加的时候出了什么差错呢，你贴出你的代码来

追问

把 .onclick = function() // TODO 改成 .click(function() alert(1) ) 成功了

本回答被提问者采纳 参考技术B 主动触发事件是一个经常会用到的技巧，它很重要。它和事件绑定一样存在着浏览器兼容性问题。传统浏览器（IE8-）使用createEventObject来创建事件对象，用fireEvent这个方法来触发事件；现代浏览器用createEvent来创建对象，用dspatchEvent来触发事件。

//获取浏览器版本
var isIE=navigator.userAgent.match(/MSIE (\d)/i);
isIE=isIE?isIE[1]:undefined;

//事件函数
function onclick(e)
e=e||event;
alert(e.msg||"表酱紫啦，人家羞涩啦～");
;

//给document绑定一个点击事件
isIE<9
//传统浏览器使用attachEvent
?document.attachEvent("onclick",onclick)
//现代浏览器使用addEventListner
:document.addEventListener("click",onclick,false);

//触发自定义事件
if(isIE<9)
//传统浏览器
//创建对象
var event=document.createEventObject();
//给事件对象添加属性
event.msg="我是fireEvent触发的";
//触发事件
document.fireEvent("onclick",event);
else
//现代浏览器
//创建事件对象
var e=document.createEvent("MouseEvents");
//初始化事件对象
e.initMouseEvent("click"),
//给事件对象添加属性
e.msg="我是despatchEvent触发的";
//触发事件
document.dispatchEvent(e);
; 参考技术C

首先你html写错了，规范如下：

<span class="publish"></span>

jquery如下：

$(function()
    $(".publish").click(function()
        alert(1)
    )
)

追问

不好意思 您的代码测试不成功，好像一定要 javascript 代码才能调用，不知道能不能改？
已经结合您的代码，和另一位朋友的代码测试成功。谢谢您的回答

谁能帮写一个点击链接自动弹出提示窗口的js代码？

我想在 Discuz! 5.0.0论坛程序中加入一段js代码，让会员点击下载附件前自动弹出提示窗口，请问怎么写？

你需要修改attachment.php文件 在根目录下
在$attachexists = $ispaid = FALSE;下面添加
if (!empty($checktwo))

在最末尾的?>前添加
else
echo "<script>alert('写上你要提示的内容')</script>";
echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"0;URL=$PHP_SELF?checktwo=1&aid=$aid\">";


我在本机架设Discuz! 5.0.1调试通过了

完整代码如下：
<?php

/*
[Discuz!] (C)2001-2006 Comsenz Inc.
This is NOT a freeware, use is subject to license terms

$RCSfile: attachment.php,v $
$Revision: 1.13 $
$Date: 2006/08/11 06:51:07 $
*/

require_once './include/common.inc.php';

$discuz_action = 14;

if($attachrefcheck && $_SERVER['HTTP_REFERER'] && preg_replace("/https?:\/\/([^\/]+).*/i", "\\1", $_SERVER['HTTP_REFERER']) != $_SERVER['HTTP_HOST'])
//header("Location: $boardurlimages/common/invalidreferer.gif");
showmessage('attachment_referer_invalid', NULL, 'HALTED');


/*
$query = $db->query("SELECT a.*, t.fid, p.authorid FROM $tablepreattachments a, $tableprethreads t, $tablepreposts p
WHERE a.aid='$aid' AND t.tid=a.tid AND p.pid=a.pid AND t.displayorder>='0' AND p.invisible='0'");
$attach = $db->fetch_array($query);
*/

periodscheck('attachbanperiods');
$attachexists = $ispaid = FALSE;
if (!empty($checktwo))
if(!empty($aid))
$query = $db->query("SELECT * FROM $tablepreattachments WHERE aid='$aid'");
if($attach = $db->fetch_array($query))
$query = $db->query("SELECT tid, fid, price, special FROM $tableprethreads WHERE tid='$attach[tid]' AND displayorder>='0'");
$thread = $db->fetch_array($query);
if($thread['fid'])
$query = $db->query("SELECT authorid FROM $tablepreposts WHERE pid='$attach[pid]' AND invisible='0'");
if($db->num_rows($query))
$attach['authorid'] = $db->result($query, 0);
$attachexists = TRUE;





if($allowgetattach && ($attach['readperm'] && $attach['readperm'] > $readaccess) && $adminid <= 0 && !($discuz_uid && $discuz_uid == $attach['authorid']))
showmessage('attachment_forum_nopermission', NULL, 'NOPERM');


if(!$thread['special'] && $thread['price'] > 0 && (!$discuz_uid || ($discuz_uid && $discuz_uid != $attach['authorid'] && $adminid <=0)))
$query = $db->query("SELECT uid FROM $tableprepaymentlog WHERE uid='$discuz_uid' AND tid='$attach[tid]'");
if($db->result($query, 0))
$ispaid = TRUE;
else
showmessage('attachment_payto', 'viewthread.php?tid='.$attach['tid']);



$filename = $attachdir.'/'.$attach['attachment'];

if(is_readable($filename) && $attachexists)

$query = $db->query("SELECT f.viewperm, f.getattachperm, f.getattachcredits, a.allowgetattach FROM $tablepreforumfields f
LEFT JOIN $tablepreaccess a ON a.uid='$discuz_uid' AND a.fid=f.fid
WHERE f.fid='$thread[fid]'");
$forum = $db->fetch_array($query);

if(!$ispaid)
if(!$forum['allowgetattach'])
if(!$forum['getattachperm'] && !$allowgetattach)
showmessage('group_nopermission', NULL, 'NOPERM');
elseif(($forum['getattachperm'] && !forumperm($forum['getattachperm'])) || ($forum['viewperm'] && !forumperm($forum['viewperm'])))
showmessage('attachment_forum_nopermission', NULL, 'NOPERM');




if(!($isimage = preg_match("/^image\/.+/", $attach['filetype'])))
checklowerlimit($creditspolicy['getattach'], -1);


if(empty($noupdate))
if($delayviewcount == 2 || $delayviewcount == 3)
$logfile = './forumdata/cache/cache_attachviews.log';
if(substr($timestamp, -1) == '0')
require_once DISCUZ_ROOT.'./include/misc.func.php';
updateviews('attachments', 'aid', 'downloads', $logfile);


if(@$fp = fopen(DISCUZ_ROOT.$logfile, 'a'))
fwrite($fp, "$aid\n");
fclose($fp);
elseif($adminid == 1)
showmessage('view_log_invalid');

else
$db->query("UPDATE $tablepreattachments SET downloads=downloads+'1' WHERE aid='$aid'", 'UNBUFFERED');



if(!$isimage)
$forum['getattachcredits'] = $forum['getattachcredits'] ? unserialize($forum['getattachcredits']) : array();
$getattachcredits = $forum['getattachcredits'] ? $forum['getattachcredits'] : $creditspolicy['getattach'];
updatecredits($discuz_uid, $getattachcredits, -1);


$filesize = filesize($filename);

ob_end_clean();
header('Cache-control: max-age=31536000');
header('Expires: '.gmdate('D, d M Y H:i:s', $timestamp + 31536000).' GMT');
header('Content-Encoding: none');
$attach['filename'] = (strtolower($charset) == 'utf-8' && strexists($_SERVER['HTTP_USER_AGENT'], 'MSIE')) ? urlencode($attach['filename']) : $attach['filename'];

if($isimage && !empty($noupdate))
header('Content-Disposition: inline; filename='.$attach['filename']);
else
header('Content-Disposition: attachment; filename='.$attach['filename']);

header('Content-Type: '.$attach['filetype']);

@$fp = fopen($filename, 'rb');
@flock($fp, 2);
$attachment = @fread($fp, $filesize);
@fclose($fp);

echo $attachment;

else

showmessage('attachment_nonexistence');


else
echo "<script>alert('$PHP_SELF')</script>";
echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"0;URL=$PHP_SELF?checktwo=1&aid=$aid\">";

?>

还有不明白的给我站内留言 enjoy it! 参考技术A 没研究过Discuz!你要先找到添加附件的页面,然后小做修改.添加附件的同时添加上你的弹出窗口.