在FireFox中包含眾多空格作為文本節點,因此在我們使用nextSibling和previousSibling時就會出現問題。因為FireFox會把文本節點誤當做元素節點的兄弟節點來處理。我們可以添加nodeType來判斷。當上一節點或者是下一節點為文本節點時,就繼續尋找,直到找到下一個元素節點。以下代碼僅供參考,在fireFox中測試通過:
//下一個兄弟節點 function nextSibling(node) { var tempLast = node.parentNode.lastChild; if (node == tempLast) return null; var tempObj = node.nextSibling; while (tempObj.nodeType != 1 && tempObj.nextSibling != null) { tempObj = tempObj.nextSibling; } return (tempObj.nodeType==1)? tempObj:null; } //前一個兄弟節點 function prevSibling(node) { var tempFirst = node.parentNode.firstChild; if (node == tempFirst) return null; var tempObj = node.previousSibling; while (tempObj.nodeType != 1 && tempObj.previousSibling != null) { tempObj = tempObj.previousSibling; } return (tempObj.nodeType==1)? tempObj:null; }

<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <script type="text/javascript" language="javascript" > window.onload = function () { var oUl = document.getElementsByTagName("UL"); var nodeLi = oUl[0].childNodes[3]; var nextListItem = nodeLi.nextSibling; var preListItem = nodeLi.previousSibling; alert(nextListItem.tagName + " " + preListItem.tagName); nextListItem = nextSibling(nodeLi); preListItem = prevSibling(nodeLi); alert(nextListItem.tagName + " " + preListItem.tagName); } //下一個兄弟節點 function nextSibling(node) { var tempLast = node.parentNode.lastChild; if (node == tempLast) return null; var tempObj = node.nextSibling; while (tempObj.nodeType != 1 && tempObj.nextSibling != null) { tempObj = tempObj.nextSibling; } return (tempObj.nodeType==1)? tempObj:null; } //前一個兄弟節點 function prevSibling(node) { var tempFirst = node.parentNode.firstChild; if (node == tempFirst) return null; var tempObj = node.previousSibling; while (tempObj.nodeType != 1 && tempObj.previousSibling != null) { tempObj = tempObj.previousSibling; } return (tempObj.nodeType==1)? tempObj:null; } </script> </head> <body> <form id="form1" runat="server"> <div> <ul> <li>HTML</li> <li>CSS</li> <li>JavaScript</li> <li>JQuery</li> <li>Dom</li> </ul> <ul> <li>ASP.NET</li> <li>JSP</li> <li>PHP</li> <li>VB.NET</li> </ul> </div> </form> </body> </html>
其中nodeType的值主要有以下幾種:
- 元素節點的nodeType值為1
- 屬性節點的nodeType值為2
- 文本節點的nodeType值為3