关于getElementsByName，很奇怪的问题。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN " "http://www.w3.org/TR/html4/loose.dtd ">
<html>
<head>
<meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 ">
<title> 企业审核/已审核 </title>
<script language= "JavaScript " src= "../../scripts/action.js ">
</script>
<script language= "javascript " type= "text/javascript ">
function ccc()
{
if(document.getElementsByName( "bbb ").value != "undefined ")
{
alert(document.getElementsByName( "bbb ").value);
}
}
</script>
</head>
<body bgcolor= "#FFFFFF " marginheight=0 marginwidth=0 leftmargin=0>
<Form name= "form1 " method= "POST " action= " ">
<input type= "text " name= "bbb " value= "111 "> </input>
<input type= "text " name= "bbb " value= "222 "> </input>
<input type= "button " onClick= "ccc(); ">
</form>
</body>
</html>
运行这段代码，看看出现的问题，感觉很奇怪。
[解决办法]
getElementsByName获取的是数组，你应该这样用：
document.getElementsByName( "bbb ")[0].value
[解决办法]
alert(document.getElementsByName( "bbb ").value);
document.getElementsByName( "bbb ")得到的是 [object]
alert(document.getElementsByName( "bbb ")[0].value);这样可以取到第一个的value
另外，undefined跟 "undefined "是不一样的！ 未初始化 跟 字符串 是不会相等的~
