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,div,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="//www.VeVB.COm/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="//www.VeVB.COm/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="//www.VeVB.COm/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>希望本文所述对大家的javascript程序设计有所帮助。
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