[英]What is wrong with selecting with my drop down element
<html>
<head>
<script type='text/javascript' language='javascript' src="http://localhost/javascript/jquery-1.4.2.js">
</script>
<script type='text/javascript' language='javascript'>
$(document).ready(function(){
$("#button").mousedown(function(){
dropDownMenu = $("#dropDownMenu");
alert(dropDownMenu.options[0].text);
});
});
</script>
</head>
<body>
<select id="dropDownMenu"><option>Test</option></select><br>
<input id="button" type="button">
</body>
</html>
Your code dropDownMenu = $("#dropDownMenu");
alert(dropDownMenu.options[0].text);
Here dropDownMenu is a JQuery object. 这里的dropDownMenu是一个JQuery对象。 So dropDownMenu.options is not defined. 因此未定义dropDownMenu.options。 Use dropDownMenu[0] or dropDownMenu.get(0) to get the first DOM element which is a 使用dropDownMenu [0]或dropDownMenu.get(0)获取第一个DOM元素,即
<select>...</select>
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