<select name="selects">
<option value="">[请选择]</option>
<option value="1">a</option>
<option value="2">b</option>
</select>如题,如果下拉列表值为1,怎么获取相应的索引,谢谢~
<option value="">[请选择]</option>
<option value="1">a</option>
<option value="2">b</option>
</select>如题,如果下拉列表值为1,怎么获取相应的索引,谢谢~
<head>
<script type="text/javascript">
window.onload = function() {
document.getElementsByTagName('select')[0].onchange = function() {
alert(this.selectedIndex);
}
}
</script>
</head>
<body>
<select name="selects">
<option value="">[请选择]</option>
<option value="1">a</option>
<option value="2">b</option>
</select></body>
</html>
<!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>
<title></title>
<script src="http://code.jquery.com/jquery-1.6.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
$('#st').change(function () {
var index = $(this).find('option').index($(this).find('option[value=' + $(this).val() + ']'));
alert(index);
});
});
</script></head>
<body>
<select name="selects" id="st">
<option value="">[请选择]</option>
<option value="1">a</option>
<option value="2">b</option>
</select></body>
</html>