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Example of how to obtain the document Node object
If you want to operate on an element, you must first obtain it. The following describes how to obtain the object of the document node. Do not miss it if you are interested.
The Code is as follows:
<Html>
<Head>
<Title> </title>
<Script>
/*
How to obtain the document Node object:
*/
// First, get it by id
Function documentDemo (){
Var tableNode = document. getElementById ("tab_id ");
TableNode. style. border = "5px solid #00ff00 ";
}
// The second type, using the name attribute
Function documentDemo2 (){
Var inputNode = document. getElementsByName ("txt ");
Alert (inputNode. length );
Alert (inputNode [0]. value );
}
// The third type is the tag name.
Function documentDemo3 (){
Var tdNode = document. getElementsByTagName ("td ");
Alert (tdNode. length );
For (var x = 0; x <tdNode. length; x ++ ){
Alert (tdNode [x]. innerText );
}
}
</Script>
<Style type = "text/css">
. Onediv {
Width: 200px;
Height: 100px;
Border: 1px solid # f00;
Margin-top: 20px;
}
Table, td {
Border: 1px solid # 00f;
Width: 200px;
Margin-top: 20px;
Text-align: center;
}
</Style>
</Head>
<Body>
<Input type = "button" value = "document Object demonstration" onclick = "documentDemo3 ()"> <br/>
<Div class = "onediv">
This is the content in the div.
</Div>
<Input type = "txt" name = "txt">
<Input type = "txt" name = "txt">
<Table cellspacing = "0" id = "tab_id">
<Tr>
<Td> java </td>
<Td> php </td>
</Tr>
<Tr>
<Td>. net </td>
<Td> ios </td>
</Tr>
</Table>
<Span> This is a span area </span> <br/>
<A href = "#"> This is a hyperlink </a>
<Body>
</Html>
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