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JavaScript操作HTML的Table

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JavaScript操作HTML的Table 
样例1（JavaScript修改Table表的行背景颜色）：
首先使用CSS定义背景颜色:

<style>
.odd{background-color: white;}
.even{background-color: gray;}
</style>

编写修改背景颜色函数:

function alternate(id){
if(document.getElementsByTagName){
   var table = document.getElementById(id);
   var rows = table.getElementsByTagName("tr");
   for(i = 0; i < rows.length; i++){
//manipulate rows
     if(i % 2 == 0){
       rows[i].className = "even";
     }else{
       rows[i].className = "odd";
     }
   }
}
}

在HTML中设置事件调用函数alternate：

<html>
…
<body onload="alternate('thetable')">
<table id="thetable">
<tr><td>…</td></tr>
</table>
…

样例2（JavaScript增加删除Table表的行）：
<html>
<head>
<title>Adding and Removing Rows from a table using DHTML and JavaScript</title>
<script language="javascript">

   //add a new row to the table
   function addRow()
   {
    //add a row to the rows collection and get a reference to the newly added row
    var newRow = document.all("tblGrid").insertRow();

    //add 3 cells (<td>) to the new row and set the innerHTML to contain text boxes

    var oCell = newRow.insertCell();
    oCell.innerHTML = "<input type='text' name='t1'>";

    oCell = newRow.insertCell();
    oCell.innerHTML = "<input type='text' name='t2'>";

    oCell = newRow.insertCell();
    oCell.innerHTML = "<input type='text' name='t3'>   <input type='button' value='Delete' onclick='removeRow(this);'/>";
   }

   //deletes the specified row from the table
   function removeRow(src)
   {
    /* src refers to the input button that was clicked.
       to get a reference to the containing <tr> element,
       get the parent of the parent (in this case case <tr>)
    */
    var oRow = src.parentElement.parentElement;

    //once the row reference is obtained, delete it passing in its rowIndex
    document.all("tblGrid").deleteRow(oRow.rowIndex);
   }

</script>
</head>
<body>
Demo of a simple table grid that allows adding and deleting rows using DHTML
and Javascript
<p/>
Try it out - Click on the Delete button to delete the corresponding row. Click Add Row button to insert a new row.
<p/>
<p/>Browser compatility - this sample has been tested to work with IE5.0 and above.
<p/>
<hr>

<table id="tblGrid" style="table-layout:fixed">
   <tr>
    <td width="150px">Field1</td>
    <td width="150px">Field2</td>
    <td width="250px">Field3</td>
   </tr>
   <tr>
    <td><input type="text" name="t1" /></td>
    <td><input type="text" name="t2" /></td>
    <td><input type="text" name="t3" />   <input type="button" value="Delete" onclick="removeRow(this);" /></td>
   </tr>
   <tr>
    <td><input type="text" name="t1" /></td>
    <td><input type="text" name="t2" /></td>
    <td><input type="text" name="t3" />   <input type="button" value="Delete" onclick="removeRow(this);" /></td>
   </tr>
   <tr>
    <td><input type="text" name="t1" /></td>
    <td><input type="text" name="t2" /></td>
    <td><input type="text" name="t3" />   <input type="button" value="Delete" onclick="removeRow(this);" /></td>
   </tr>
   <tr>
    <td><input type="text" name="t1" /></td>
    <td><input type="text" name="t2" /></td>
    <td><input type="text" name="t3" />   <input type="button" value="Delete" onclick="removeRow(this);" /></td>
   </tr>
</table>
<hr>
<input type="button" value="Add Row" onclick="addRow();" />
<hr>
<a href='http://www.interviewboard.com'>Interviewboard - Interview Questions and Answers on ASP.NET, C#, SQL, Oracle and more....</a>
</body>
</html>

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标签： javascript table html button delete reference

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