用于从组合框中获取选定值的 JavaScript 代码
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JavaScript code for getting the selected value from a combo box
提问by user181891
Can any one give me a sample code that gets the selected value from an existing combo box?
谁能给我一个示例代码，从现有的组合框中获取选定的值？
I have this code but its not doing anything:
我有这个代码，但它没有做任何事情：
function check ()
{
var e = document.getElementById("ticket_category_clone");
var str = e.options[e.selectedIndex].text;
alert(str);
if (str==="Hardware")
{
SPICEWORKS.utils.addStyle('#ticket_c_hardware_clone{display: none !important;}');
}
}
SPICEWORKS.app.helpdesk.ready(check);?
heres a imgof the code
这是代码的img
and the code
和代码
<select id="ticket_category_clone" name="ticket[category]" hdpp="ticket_category">
<option value=""></option><option value="Hardware">Hardware</option>
<option value="Software">Software</option>
<option value="Rede" selected="selected">Rede</option>
<option value="Pedidos">Pedidos</option>
<option value="Forma??o/Dúvida">Forma??o/Dúvida</option>
<option value="Outro">Outro</option><option value="#edit_categories#">Edit Categories...</option></select>
what i want its find a way to get the selected value fo that combobox
我希望它找到一种方法来获取该组合框的选定值
回答by Willem D'Haeseleer
There is an unnecessary hashtag; change the code to this:
有一个不必要的标签；将代码更改为：
var e = document.getElementById("ticket_category_clone").value;
回答by ThdK
I use this
我用这个
var e = document.getElementById('ticket_category_clone').value;
Notice that you don't need the '#' character in javascript.
请注意，您不需要 javascript 中的“#”字符。
function check () {
var str = document.getElementById('ticket_category_clone').value;
if (str==="Hardware")
{
SPICEWORKS.utils.addStyle('#ticket_c_hardware_clone{display: none !important;}');
}
}
SPICEWORKS.app.helpdesk.ready(check);?
回答by Sjuul Janssen
It probably is the # sign like tho others have mentioned because this appears to work just fine.
它可能是其他人提到的 # 符号，因为这似乎工作得很好。
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<select id="#ticket_category_clone">
<option value="hw">Hardware</option>
<option>fsdf</option>
<option>sfsd</option>
<option>sdfs</option>
</select>
<script type="text/javascript">
(function check() {
var e = document.getElementById("#ticket_category_clone");
var str = e.options[e.selectedIndex].text;
alert(str);
if (str === "Hardware") {
alert('Hi');
}
})();
</script>
</body>
