attributes:獲取一個屬性作爲對象
getAttribute
:獲取某一個屬性的值
setAttribute:建立一個屬性,並同時給屬性捆綁一個值
createAttribute:僅建立一個屬性
removeAttribute:刪除一個屬性
getAttributeNode:獲取一個節點作爲對象
setAttributeNode:建立一個節點
removeAttributeNode:刪除一個節點
attributes可以獲取一個對象中的一個屬性,並且作爲對象來調用,注意在這裏要使用“[]”,IE在這裏可以使用“()”,考慮到兼容性的問題,要使用“[]”。關於attributes屬性的使用方式上,IE和FF有巨大的分歧,在此不多介紹。
attributes的使用方法:(IE和FF通用)
- < body >
- < div id = "t" > < input type = "hidden" id = "sss" value = "aaa" > </ div >
- </ body >
<body>
<div id = "t"><input type = "hidden" id = "sss" value
= "aaa"></div>
</body>
- <script>
- var d = document.getElementById( "sss" ).attributes[ "value " ];
- document.write(d.name);
- document.write(d.value );
- //顯示value aaa
- </script>
getAttribute ,setAttribute,createAttribute,removeAttribute四兄弟的概念比較容易理解,使用方法也比較簡單,唯一需要注意這幾點:
1、createAttribute在使用的時候不需要基於對象的,document.createAttribute()就可以。
2、setAttribute,createAttribute在使用的時候如果是使用的時候不要使用name,type,value 等單詞,IE都FF的反應都奇怪的難以理解。
3、createAttribute在使用的時候如果只定義了名字,沒有d.nodeValue = "hello";語句定義值,FF會認爲是一個空字符串,IE認爲是undefined,注意到這點就可以了。
getAttribute 的使用方法:
- < body >
- < div id = "t" > < input type = "hidden" id = "sss" value = "aaa" > </ div >
- </ body >
<body>
<div id = "t"><input type = "hidden" id = "sss" value
= "aaa"></div>
</body>
- <script>
- var d = document.getElementById( "sss" ).getAttribute ( "value " );
- document.write(d);
- //顯示 aaa
- </script>
setAttribute的使用方法:(你會發現多了一個名爲good的屬性hello)
- < body >
- < div id = "t" > < input type = "hidden" id = "sss" value = "aaa" > </ div >
- </ body >
<body>
<div id = "t"><input type = "hidden" id = "sss" value
= "aaa"></div>
</body>
- <script>
- var d = document.getElementById( "sss" ).setAttribute( "good" , "hello" );
- alert(document.getElementById( "t" ).innerHTML)
- </script>
createAttribute的使用方法:(多了一個名爲good的空屬性)
- < body >
- < div id = "t" > < input type = "hidden" id = "sss" value = "aaa" > </ div >
- </ body >
<body>
<div id = "t"><input type = "hidden" id = "sss" value
= "aaa"></div>
</body>
- <script>
- var d = document.createAttribute( "good" );
- document.getElementById( "sss" ).setAttributeNode(d);
- alert(document.getElementById( "t" ).innerHTML)
- </script>
removeAttribute的使用方法:(少了一個)
- < body >
- < div id = "t" > < input type = "hidden" id = "sss" value = "aaa" > </ div >
- </ body >
<body>
<div id = "t"><input type = "hidden" id = "sss" value
= "aaa"></div>
</body>
- <script>
- var d = document.getElementById( "sss" ).removeAttribute( "value " );
- alert(document.getElementById( "t" ).innerHTML)
- </script>
getAttributeNode,setAttributeNode,removeAttributeNode三個方法的特點是都直接操作一個node(節點),removeAttributeNode在一開始的時候總會用錯,但是充分理解了node的含義的時候,就能夠應用自如了。
getAttributeNode的使用方法:
- < body >
- < div id = "t" > < input type = "hidden" id = "sss" value = "aaa" > </ div >
- </ body >
<body>
<div id = "t"><input type = "hidden" id = "sss" value
= "aaa"></div>
</body>
- <script>
- var d = document.getElementById( "sss" ).getAttributeNode( "value " );
- document.write(d.name);
- document.write(d.value );
- //顯示 value aaa
- </script>
- < body >
- < div id = "t" > < input type = "hidden" id = "sss" value = "aaa" > </ div >
- </ body >
<body>
<div id = "t"><input type = "hidden" id = "sss" value = "aaa"></div>
</body>
- <script>
- var d = document.createAttribute( "good" );
- document.getElementById( "sss" ).setAttributeNode(d);
- alert(document.getElementById( "t" ).innerHTML);
- </script>
removeAttributeNode的使用方法:
- < body >
- < div id = "t" > < input type = "hidden" id = "sss" value = "aaa" > </ div >
- </ body >
<body>
<div id = "t"><input type = "hidden" id = "sss" value = "aaa"></div>
</body>
- <script>
- var d = document.getElementById( "sss" ).getAttributeNode( "value" )
- document.getElementById( "sss" ).removeAttributeNode(d);
- alert(document.getElementById( "t" ).innerHTML);
- </script>