网页元素值读取示例-优快云博客

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="../conn/jsfile/jquery.js" type="text/javascript"></script>
</head>
<body>
<form id="form1" >
文本框：<input type="text" id="txt" value="txt" /><br />

单选按钮：<input type="radio" value="男" checked="checked" name="sex" />男 <input type="radio" value="女" name="sex" checked="checked"/>女<br />

复选框：<input type="checkbox" value="1" name="cc"/>1<input type="checkbox" value="2" checked="checked" name="cc" />2<input type="checkbox" value="3" checked="checked" name="cc" />3<br />

下拉框：
<select id="sel" style="width: 100px">
<option value="yi">1</option>
<option value="er" selected="selected">2</option>
<option value="san">3</option>
</select>
<script language="javascript" type="text/javascript">
/*------------------------------------------------javascript-------------------------------------------*/
/* 获取文本框的值
alert(document.getElementById("txt").value);
*/

/*获取单选按钮的值
var radios = document.getElementsByName("sex");
var n = radios.length;
for (var i = 0; i < n; i++) {
if (radios.checked) {
alert(radios.value);
}
}
*/
/*获取复选框中选中的值的组合 1,2,3,4
var checkboxs = document.getElementsByName("cc");
var n = checkboxs.length;
for (var i = 0; i < n; i++) {
if (checkboxs.checked) {
alert(checkboxs.value);
}
}
*/
/*获取下拉列表的选中项的值
方法一：
alert(document.getElementById("sel").value);

方法二：
var sel = document.getElementById("sel");
alert(sel.options[sel.selectedIndex].value);
*/

js获取表单的值