本文實例講述了JavaScript實現節點的刪除與序號重建。分享給大家供大家參考。具體如下：
這里演示JavaScript節點的刪除與重建方法，刪除節點后，會自動重新建立節點，序號自動排列，比如刪除當前的第3條數據后，第4條的序號會智能變為3，以此類推，保證序號不亂。
運行效果如下圖所示：
刪除前：
刪除后：
具體代碼如下：
<!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>節點重建、示例代碼</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">編號</th> <th>標題</th> <th width="50">操作</th> </tr></thead><tbody id="reroder-list"> <tr> <td>1</td> <td class="left"><a href="http://m.survivalescaperooms.com/article/70631.htm">JS+CSS實現表格高亮的方法</a></td> <td><a href="#del" class="lnk-del">刪除</a></td> </tr> <tr> <td>2</td> <td class="left"><a href="http://m.survivalescaperooms.com/article/70625.htm">JavaScript節點及列表操作實例小結</a></td> <td><a href="#del" class="lnk-del">刪除</a></td> </tr> <tr> <td>3</td> <td class="left"> <a href="http://m.survivalescaperooms.com/article/70613.htm">JavaScript實現刪除,移動和復制文件的方法</a></td> <td><a href="#del" class="lnk-del">刪除</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>希望本文所述對大家的javascript程序設計有所幫助。
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