javascript当中Element如何用 getAttribute和 setAttribute

例 3.2
马克- to-win：马克 java社区：防盗版实名手机尾号： 73203。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<SCRIPT LANGUAGE="JavaScript">
<!--
function fun()
{
    var ele = document.getElementById("txt")
/*Element.getAttribute() (Method)
An accessor for reading named custom attributes.

Property/method value type: String primitive
JavaScript syntax: - myElement.getAttribute(anAttribName)
*/
    var v = ele.getAttribute("value");
    var nq = ele.getAttribute("NAME");
    var tp = ele.getAttribute("type");
    var qn = ele.getAttribute("qixyNewAttribute");
    alert(v+nq+tp+qn);
}
function fun2()
{
    var ele = document.getElementById("txt")
    alert(ele.getAttribute("value"));//马克-to-win：这样不能把input中实时的值取回来，getAttribute只能取初值，或setAttribute设置的值
    ele.setAttribute("value",ele.getAttribute("value")+"111");
    alert(ele.getAttribute("value"));
    ele.setAttribute("value",ele.value);//这样才能把input中实时的值取回来，getAttribute只能取初值，或setAttribute设置的值。
    alert(ele.getAttribute("value"));
    ele.setAttribute("qixyNewAttribute",ele.getAttribute("value"));
}
//-->
</SCRIPT>
</HEAD>

<BODY>
<INPUT TYPE="text" id="txt" NAME="nameq" value="please input新中文" ><P>
<INPUT TYPE="button" value="getAttribute测试" onclick="fun()">
<INPUT TYPE="button" value="setAttribute测试" onclick="fun2()">
</BODY>
</HTML>