本文实例讲述了javascript实现节点的删除与序号重建。分享给大家供大家参考。具体如下：
这里演示javascript节点的删除与重建方法，删除节点后，会自动重新建立节点，序号自动排列，比如删除当前的第3条数据后，第4条的序号会智能变为3，以此类推，保证序号不乱。
运行效果如下图所示：
删除前：
删除后：
具体代码如下：
<!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=utf-8" />
<title>节点重建、示例代码</title>
<style type="text/css">
html{color:#000;background:#fff;font-family:arial, helvetica, sans-serif;}
body,p,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,textarea,p,blockquote,th,td{margin:0;padding:0;}
table{border-collapse:collapse;border-spacing:0;}
fieldset,img{border:0;}
address,caption,cite,code,dfn,em,strong,th,var{font-style:normal;font-weight:normal;}
li{list-style:none;}
caption,th{text-align:left;}
h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal;}
q:before,q:after{content:"";}
abbr,acronym{border:0;font-variant:normal;}
sup{vertical-align:text-top;}
sub{vertical-align:text-bottom;}
input,textarea,select{font-family:inherit;font-size:inherit;font-weight:inherit;}
input,textarea,select{*font-size:100%;}
legend{color:#000;}
body{text-align:center;color:#000;}
a:link,a:visited,a:hover{text-decoration:none;color:#049;}
a:hover{text-decoration:underline;}
table{margin:30px auto;width:600px;border:1px solid #cdcdcd;}
thead{background-color:#f3f3f3;}
th,td{height:26px;line-height:26px;font-size:14px;text-align:center;}
.left{text-align:left;}
</style>
<base target="_blank" />
</head>
<body>
<table cellpadding="0" cellspacing="0">
<thead>
<tr>
<th width="50">编号</th>
<th>标题</th>
<th width="50">操作</th>
</tr>
</thead>
<tbody id="reroder-list">
<tr>
<td>1</td>
<td class="left"><a href="http://www.jb51.net/article/70631.htm">js+css实现表格高亮的方法</a></td>
<td><a href="#del" class="lnk-del">删除</a></td>
</tr>
<tr>
<td>2</td>
<td class="left"><a href="http://www.jb51.net/article/70625.htm">javascript节点及列表操作实例小结</a></td>
<td><a href="#del" class="lnk-del">删除</a></td>
</tr>
<tr>
<td>3</td>
<td class="left"> <a href="http://www.jb51.net/article/70613.htm">javascript实现删除,移动和复制文件的方法</a></td>
<td><a href="#del" class="lnk-del">删除</a></td>
</tr>
</tbody>
</table>
<script type="text/javascript">
var delandreorder = function(root,rowtag,deltag,delclass,idtag){
var doc = document,
list = doc.getelementbyid(root || "reroder-list");
if(!list){
return false;
}
var stopevent = function(evt){
stoppropagation(evt);
preventdefault(evt);
},
stoppropagation = function(evt){
if (evt.stoppropagation) {
evt.stoppropagation();
}
else {
evt.cancelbubble = true;
}
},
preventdefault = function(evt){
if (evt.preventdefault) {
evt.preventdefault();
}
else {
evt.returnvalue = false;
}
},
hasclass = function(elem, classname){
var has = new regexp("(?:^|\s+)" + classname + "(?:\s+|$)");
return has.test(elem.classname);
},
byclass = function(tag,classname,root){
var elems = [],
tempel = root.getelementsbytagname(tag),
i,
len = tempel.length;
for (i = 0; i < len; ++i) {
if (hasclass(tempel[i], classname)) {
elems.push(tempel[i]);
}
}
if (elems.length < 1) {
return false;
}
else {
return elems;
}
},
firsttds = [],
rows = list.getelementsbytagname(rowtag || "tr"),
delbtns = byclass((deltag || "a"), (delclass || "lnk-del"), list),
i = 0,
len = rows.length,
reorder = function(idx){
var i = idx, len = firsttds.length;
if(idx!==(len-1)){
for(;i<len;i+=1){
firsttds[i].innerhtml = i;
}
}
};
for (; i < len; i += 1) {
firsttds.push(rows[i].getelementsbytagname(idtag || "td")[0]);
delbtns[i].onclick = function(idx){
return function(event){
var evt = event || window.event;
list.removechild(rows[idx]);
reorder(idx);
delandreorder();
stopevent(evt);
};
}(i);
}
}
delandreorder();
</script>
</body>
</html>
以上就是实例讲解javascript实现节点的删除与序号重建的详细内容。