我有以下代码片段:
var oldInput = document.getElementsByName ("prio");
oldInput[0].setAttribute ("disabled", "disabled");
这是相关的目标网页HTML(更正):
<div id="content">
<p>(CONTENT)</p>
<form>
<p>Priority: <input name="prio" type="text" value="285"></p>
<p>Success: <input name="succ" type="text" value="6"></p>
</form>
</div>
<table border="0" cellspacing="0" width="100%">
<tbody>
<tr>
<td class="user">
<a href="#" class="nav" title="Logout John">Logout</a>
(User: John)
</td>
</tr>
</tbody>
</table>
我有很多用户的1个接入点。但我希望5个用户能够更改prio
值。您可以看到用户名在页脚中。
是否有可能在javascript中使用上面的代码为Firefox 2.x并且没有jQuery?
示例:
if USER (from footer) == JOHN || LUKE || JEFF || MAX || ANDY
do nothing
else
disable PRIO BOX (from content)
答案 0 :(得分:1)
试试这个:
var tds = document.getElementsByTagName("TD",
footerText = tds[tds - 1].textContent,
user = footerText.match(/\(User: ([^\)]*\))/)[1].toUpperCase();
if (" JOHN LUKE JEFF MAX ANDY ".indexOf(" " + user + " ") !== -1) {
// Do stuff
} else {
// Do else stuff
var oldInput = document.getElementsByName("prio");
oldInput[0].setAttribute("disabled", "disabled");
}
注意:您的伪代码与您在单词中所说的完全相反。将上述代码修复为您的实际需求。
编辑:我不记得Firefox 2是否支持数组indexOf
。确实如此。所以你可以改用这一行:
if (["JOHN", "LUKE", "JEFF", "MAX", "ANDY"].indexOf(user) !== -1) {
编辑2 :我刚刚看到您的编辑并相应地更改了答案。我希望您的HTML代码段实际上反映了网页的来源,或者发现页脚元素需要其他方法。
答案 1 :(得分:1)
var allowed_users = ['John', 'Luke', 'Jeff', 'Max', 'Andy'];
var user = /\(User: ([^)]*)\)/.exec(document.getElementById('footer').textContent)[1];
if(allowed_users.indexOf(user) === -1) // user not in allowed_users array, disable priority
{
var oldInput = document.getElementsByName('prio')[0];
oldInput.setAttribute('disabled', 'disabled');
}
答案 2 :(得分:1)
此应在Firefox 2.0中运行:
//--- Make sure this list of names is all uppercase.
var usersWhoCanSetPriority = ['JOHN', 'LUKE', 'JEFF', 'MAX', 'ANDY'];
var bDisablePrio = true;
var tdNodes = document.getElementsByTagName ("TD");
for (var J = tdNodes.length - 1; J >= 0; --J) {
var tdNode = tdNodes[J];
if (tdNode.className == "user") {
var userName = tdNode.textContent.replace (
/^(?:.|\n|\r)+\(User:\s+([^)]+)\)(?:.|\n|\r)+$/i, "$1"
).toUpperCase ();
if (usersWhoCanSetPriority.indexOf (userName) > -1) {
bDisablePrio = false;
}
}
}
if (bDisablePrio) {
var oldInput = document.getElementsByName ("prio");
oldInput[0].setAttribute ("disabled", "disabled");
}