HTML--通过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>
<!-- sample table grid with 3 columns and 4 rows that are presented by default -->
<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>
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</body>
</html>
