javascript获取所有同类checkbox选项(实例代码)

  <!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=gb2312" />

  <title>无标题文档</title>

  <script type="text/javascript">

  function getChecked() {

  alert(document.getElementsByName("id").length);

  var owner=document.getElementsByName("id").item;

  for (i = 0; i < document.getElementsByName("id").length; i++) {

  if(document.getElementsByName("id")[i].checked){

  alert(document.getElementsByName("id")[i].value);

  }

  }

  }

  </script>

  </head>

  <body>

  <input type="checkbox" name="id" class="cbox" value="1" checked="checked"/>

  <input type="checkbox" name="id" class="cbox" value="2" />

  <input type="checkbox" name="id" class="cbox" value="3" />

  <input type="checkbox" name="id" class="cbox" value="4" />

  <input type="button" onclick="getChecked()" value="差卡巴"/>

  </body>

  </html>