javascript FAQ函数(提问+回复)_javascript技巧

效果如下图：当点击问题时显示下面的回复内容。

复制代码 代码如下:

script type="text/javascript">
onload = function(){
faq(document.getElementsByTagName("dl")[0], "dt", "dd");
/*
* faq函数：elem是父元素，qTag是标题元素，aTag是内容元素
*/
}
function faq(elem, qTag, aTag){
aTag = aTag || "dd"; //提供默认值，下同
qTag = qTag || "dt";
elem = elem || document;
var dds = elem.getElementsByTagName(aTag);
for (var i = 0, len = dds.length; i dds[i].style.display = "none";
}
var dts = elem.getElementsByTagName(qTag);
for (var i = 0, len = dts.length; i dts[i].style.cursor = "hand";
dts[i].onclick = function(){
var next = this.nextSibling;
//获得当前元素的下一个元素的引用
while (next.nodeType != 1) {
next = next.nextSibling;
}
if (next.style.display != "none") {
next.style.display = "none";
}
else {
next.style.display = "block";
}
}
}
}

测试代码：

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <title>Untitled Document</title> <script type="text/javascript"> onload = function(){ faq(document.getElementsByTagName("dl")[0], "dt", "dd"); /* * faq函数：elem是父元素，qTag是标题元素，aTag是内容元素 */ } function faq(elem, qTag, aTag){ aTag = aTag || "dd"; //提供默认值，下同 qTag = qTag || "dt"; elem = elem || document; var dds = elem.getElementsByTagName(aTag); for (var i = 0, len = dds.length; i < len; i++) { dds[i].style.display = "none"; } var dts = elem.getElementsByTagName(qTag); for (var i = 0, len = dts.length; i < len; i++) { dts[i].style.cursor = "hand"; dts[i].onclick = function(){ var next = this.nextSibling; //获得当前元素的下一个元素的引用 while (next.nodeType != 1) { next = next.nextSibling; } if (next.style.display != "none") { next.style.display = "none"; } else { next.style.display = "block"; } } } } </script> <style type="text/css"> dd { background: #eee; border: 1px solid #ccc; margin-left: 2px; padding: 4px; } </style> <dl> <dt> <b>One question:What are ready to do?</b> </dt> <dd> What I want to do is you,do you understand my feeling to you. I hope you are the same to me. </dd> <dt> <b>Two questing:What do you want?</b> </dt> <dd> I want to see you now,I miss you so much,I want to see you at this moment. </dd> <dt> Three question:Do you want to have a girlfriend? </dt> <dd> I think everyone want it so much,me too,I want to have someone talk to me everyday. </dd> </dl>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]