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JavaScript HTML DOM ??(??)

HTML ?? ??

var newEle =document.createElement(p);

??? ??? ?? ??? ?????.

A.appendChild(B): B? ? ??? ?? A ?? ?? B? ??? ?? ?? ?? ?? ?????.

??? B? ??? ?? ?? ?? ? ?? ??? B ??? A? ?? ??? ???? ????.

appendChild() ? ??? innerHTML ??? ??? ??? ????. ???? ??? ????.

1 innerHTML?appendChild?? ??? ?????(??? ?? ??? ???? ??? ? ????).

2 innerHTML? ??? ??? ??appendChild?? ? ?????. ??

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<div id="div1">
<p id="p1">這是一個(gè)段落。</p>
<p id="p2">這是另一個(gè)段落。</p>
</div>
<script>
var para=document.createElement("p");
var node=document.createTextNode("這是一個(gè)新段落。");
para.appendChild(node);
var element=document.getElementById("div1");
element.appendChild(para);
</script>
</body>
</html>

?? ??:

? ??? ???

??? ?????:

var para=document.createElement("p");

??? ???? ????? ?? ???? ???? ???. ??. ? ??? ??? ??? ?????:

var node=document.createTextNode("This is a new Parallel.");

?? ?? ? ??? ???

??? ???? ???:

para.appendChild (node);

????? ?? ??? ? ??? ???? ???.

? ??? ?? ??? ????.

var element=document.getElementById("div1");

?? ??? ?? ?? ?? ? ??? ?????.

element.appendChild(para );


Remove HTML elements

removechild ??? ?? ??? ??? ?? ??? ??? ? ????.

? ??? ?? ??? ????? ???? ??? ??? ????, ??? ??? null? ?????.

?? ??:

fatherObj.removeChild(childrenObj)

???? ??:

1.fatherObj: ??? ?? ??? ?? ?????.
2.childrenObj: ??? ?? ?? ?????.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<div id="div1">
<p id="p1">這是一個(gè)段落。</p>
<p id="p2">這是另一個(gè)段落。</p>
</div>
<script>
var parent=document.getElementById("div1");
var child=document.getElementById("p1");
parent.removeChild(child);
</script>
</body>
</html>

?? ??

? HTML ???? ? ?? ?? ??(? ?? <p> ??)? ?? <div> ??? ???? ????.

<div id="div1">
<p id="p1">這是一個(gè)段落。</p>
<p id="p2">這是另一個(gè)段落。</p>
</div>

id="div1"? ?? ??:

var parent=document.getElementById("div1");

id="p1"?

?? ??:

var child=document.getElementById("p1");

?? ???? ?? ?? ??:

parent.removeChild(child);
???? ??
||
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>php中文網(wǎng)(php.cn)</title> <script> //顯示用戶信息 function ShowData() { var userList = GetUserList(); var tabUser = document.getElementById("tabUser"); for (var i = 0; i < userList.length; i++) { var tr = document.createElement("tr"); var td1 = document.createElement("td"); var td2 = document.createElement("td"); td1.innerHTML = userList[i].UserId; td2.innerHTML = userList[i].UserName; tr.appendChild(td1); tr.appendChild(td2); tabUser.appendChild(tr); } } //清空用戶信息 function RemoveData() { var tabUser = document.getElementById("tabUser"); for (var i = tabUser.childNodes.length - 1; i >= 0; i--) { tabUser.removeChild(tabUser.childNodes[i]); } } //獲取用戶列表 function GetUserList() { var userList = []; var user1 = { UserId: 1, UserName: "Kevin" }; var user2 = { UserId: 2, UserName: "Joins" }; userList.push(user1); userList.push(user2); return userList; } </script> </head> <body> <table id="tabUser" border="1"></table> <input type="button" id="btnShowData" onclick="ShowData()" value="顯示數(shù)據(jù)" /> <input type="button" id="btnRemoveData" onclick="RemoveData()" value="清空數(shù)據(jù)" /> </body> </html>