我有一张信息表。表格的第一列有复选框。我可以通过选中复选框使用按钮添加/删除行。我现在遇到的问题是如何使用标题上的复选框选择或取消选择所有复选框。
这是我的代码:
<HTML>
<HEAD>
<TITLE> Add/Remove dynamic rows in HTML table </TITLE>
<SCRIPT language="javascript">
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
var row = table.insertRow(rowCount);
var cell1 = row.insertCell(0);
var element1 = document.createElement("input");
element1.type = "checkbox";
element1.name="chkbox[]";
cell1.appendChild(element1);
var cell2 = row.insertCell(1);
cell2.innerHTML = rowCount;
var cell3 = row.insertCell(2);
cell3.innerHTML = rowCount;
var cell4 = row.insertCell(3);
cell4.innerHTML = rowCount;
var cell5 = row.insertCell(4);
cell5.innerHTML = rowCount;
var cell6 = row.insertCell(5);
cell6.innerHTML = rowCount;
}
function deleteRow(tableID) {
try {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
for(var i=1; i<rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if(null != chkbox && true == chkbox.checked) {
table.deleteRow(i);
rowCount--;
i--;
}
}
}catch(e) {
alert(e);
}
}
function checkAll(formname, checktoggle)
{
var checkboxes = new Array();
checkboxes = document[formname].getElementsByTagName('input');
for (var i=0; i<checkboxes.length; i++) {
if (checkboxes[i].type == 'checkbox') {
checkboxes[i].checked = checktoggle;
}
}
}
</SCRIPT>
</HEAD>
<BODY>
<INPUT type="button" value="Add Row" onclick="addRow('dataTable')" />
<INPUT type="button" value="Delete Row" onclick="deleteRow('dataTable')" />
<TABLE id="dataTable" border="1">
<tr>
<th><INPUT type="checkbox" name="chk[]"/></th>
<th>Make</th>
<th>Model</th>
<th>Description</th>
<th>Start Year</th>
<th>End Year</th>
</tr>
</TABLE>
</BODY>
</HTML>