Javascript （将显示）。您可以在此处进行测试：。底线是您不应该使用display:none从列表中删除选项。@JonathanSampson，当删除是临时的时，您应该这样做。删除显示：无比重新附加整个列表快得多。Chrome现在在发布版本中支持显示：无。有趣的是，当设
Javascript （将显示）。您可以在此处进行测试：。底线是您不应该使用display:none从列表中删除选项。@JonathanSampson，当删除是临时的时，您应该这样做。删除显示：无比重新附加整个列表快得多。Chrome现在在发布版本中支持显示：无。有趣的是，当设,javascript,firefox,coding-style,google-chrome,Javascript,Firefox,Coding Style,Google Chrome,（将显示）。您可以在此处进行测试：。底线是您不应该使用display:none从列表中删除选项。@JonathanSampson，当删除是临时的时，您应该这样做。删除显示：无比重新附加整个列表快得多。Chrome现在在发布版本中支持显示：无。有趣的是，当设置为“不显示”时，它不会隐藏。我个人认为它不应该遵循与dom中其他元素不同的规则，即使它是一个浏览器表单元素。IE像往常一样是最后一个，仍然给我们带来不必要的麻烦。$（'select option[value=“1”]”）。remove（）正在
（将显示）。您可以在此处进行测试：。底线是您不应该使用
display:none$（'select option[value=“1”]”）。remove（）正在工作
<form>
<select>
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<input type="button" onclick="document.getElementsByTagName('option')[0].style.display='none'" value="hide option 1">
</form>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script>
removeIt = function()
{
var theSelect = document.getElementById("theSelect");
var theOption = document.getElementById("theOption");
theSelect.removeChild(theOption);
};
</script>
</head>
<body>
<select id="theSelect">
<option>1</option>
<option id="theOption">2</option>
<option>3</option>
</select>
<input type="button" onclick="removeIt()" value="remove it!"/>
</body>
</html>
document.getElementsByTagName('option')[0].disabled='disabled'
function removeOptionSelected() {
var ddl = document.getElementById('ddl_DropList');
var i;
for (i = ddl.length - 1; i >= 0; i--) {
ddl.remove(i);
}
}
function addOptions3() {
removeOptionSelected();
var ddl = document.getElementById('ddl_DropList');
var elOptNew = document.createElement('option');
elOptNew.text = 'Monthly Top Producer(Project)';
elOptNew.value = 'GCE';
try {
ddl.add(elOptNew, null); // standards compliant; doesn't work in IE
}
catch (ex) {
ddl.add(elOptNew); // IE only
}
elOptNew = document.createElement('option');
elOptNew.text = 'Monthly Top Leaders - DD';
elOptNew.value = 'DRE';
try {
ddl.add(elOptNew, null); // standards compliant; doesn't work in IE
}
catch (ex) {
ddl.add(elOptNew); // IE only
}
elOptNew = document.createElement('option');
elOptNew.text = 'Monthly Top Leaders - SDD';
elOptNew.value = 'DRESDD';
try {
ddl.add(elOptNew, null); // standards compliant; doesn't work in IE
}
catch (ex) {
ddl.add(elOptNew); // IE only
}
elOptNew = document.createElement('option');
elOptNew.text = 'Monthly Top Leaders - GD';
elOptNew.value = 'GRE';
try {
ddl.add(elOptNew, null); // standards compliant; doesn't work in IE
}
catch (ex) {
ddl.add(elOptNew); // IE only
}
}
$('form table tr').eq(1).remove();
$('form table tr')
eq(1)
remove()
$('select option[value="1"]').remove();
$('form[name="date"] selection[name="day"] option[value="1"]').remove();
$('form#date selection#day option[value="1"]').remove();
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Demo Page</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
<script>
function sourceListChange() {
var oVisible = $('#destList');
var newCategory = $( "#sourceList" ).val()||'';
var oToShow = $();
oHiddenDestList.append(oVisible.find('option'));
if (newCategory) {
oToShow = oHiddenDestList.find('.'+newCategory);
}
if (oToShow.length==0) {
oVisible.append (oHiddenDestList.find('.NA'));
} else if (oToShow.length!=1) {
oVisible.append (oHiddenDestList.find('.SELECT'));
}
oVisible.prop('selectedIndex', 0);
oVisible.append (oToShow);
}
$(document).ready(function() {
sourceListChange();
});
var oHiddenDestList = $(document.createElement('select'));
</script>
<style>
</style>
</head>
<body>
Select a parent group:
<select id="sourceList" onchange="sourceListChange()">
<option class="SELECT" value="" selected disabled>Please Select</option>
<option value="veg">Vegetables</option>
<option value="fruit">Fruit</option>
</select>
<select id="destList">
<option class="SELECT" value="*" selected disabled>Please Select</option>
<option class="NA" value="" selected disabled>Not Applicable</option>
<option class="fruit">Apple</option>
<option class="fruit">Bannana</option>
<option class="veg">Carrot</option>
<option class="veg">Pea</option>
</select>
</body>
</html>
var ua = navigator.userAgent.toLowerCase();
var check = function(r) { return r.test(ua);};
var isChrome = check(/chrome/);
`
var f=document.getElementById('select_tag_id');
f.options[i].style.display='none';
if (isChrome) f.size=2;