js 按钮交互 元素属性获取
<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>Untitled Document</title><script type="text/javascript">function hide(){var button = document.getElementById('myButton');button.setAttribute("value","show image");button.onclick=show;}function show(){var button = document.getElementById('myButton');button.setAttribute("value","hide image");button.onclick=hide;}function read(){varbutton=document.getElementById('chineseButton');alert(button.getAttribute('value'));//直接获取属性的值//或者varbutton=document.getElementById('chineseButton').value; alert(button.attributes.nodeValue); //此句和下面一句等效alert(button.attributes.item(0).nodeValue);//注意： 是button.attributes.item(0)不是button.attributes.item也不是button.nodeValue//循环遍历属性 var msg="found elements!";for(var j=0;j<button.attributes.length;j++){var att=button.attributes.item(j); msg=msg+"\n"+att.nodeName+":'"+att.nodeValue+"'";}alert(msg);if(button.getAttribute('value')=='我们'){alert('汉字');}}</script></head><body><input type="button" value="hide img" id="myButton" /><input type="button" value="我们" id="chineseButton" /></body></html>
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