asked on

jQuery to traverse a table

I want to trawl the table 'tb1' and grab the value of the first TD, (ie the ID number), if
the third TD for that row, checkbox element is checked. (I will then build a list and use AJAX to update the table changes back to the database).

How do I collect these items? I got a bit bogged down tring to traverse the table !!

Cheers.

<html>
<head>
<title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$("#btnUpdateTable1").bind("click", fnUpdateTable1);
$("#btnUpdateTable1").attr("value", "Update Table 1");
});
function fnUpdateTable1() {

$("#tb1 > tbody > tr").each(function() {

// ????

});
}
</script>
</head>
<body>
<table border='1' id='tb1'>
      <tbody>
            <tr>
                  <td>10</td>
                  <td>Birmingham</td>
                  <td><input type='checkbox' /></td>
            </tr>
            <tr>
                  <td>11</td>
                  <td>Newcastle</td>
                  <td><input type='checkbox' checked/></td>
            </tr>
            <tr>
                  <td>12</td>
                  <td>London</td>
                  <td><input type='checkbox' /></td>
            </tr>
      </tbody>
</table>
<p>
<input type="button" id="btnUpdateTable1" />
</body>
</html>

Albert Van Halen

Use this
All values (the contents of the first table-cell) are pushed into an array (values)

var values = [];
$("#tb1 input:checked").each(function() {
	values.push($(this).parent().prevAll(":last").text());
});

Open in new window

jonatec

ASKER

If I put an alert in place to inspect the contents of the array, it show "11" three times, should it only collect "11" once ?

function fnUpdateTable1() {

$("#tb1 > tbody > tr").each(function() {

var values = [];
$("#tb1 input:checked").each(function() {
values.push($(this).parent().prevAll(":last").text());
});

alert(values)

});

}

Albert Van Halen

Remove your first each function
My solution was to process each checked checkbox within the table
Your solution includes the processing of each table row and therefore pushing the value 11 into the array 3 times (3 rows)

function fnUpdateTable1() {
	var values = [];
	$("#tb1 input:checked").each(function() {
		values.push($(this).parent().prevAll(":last").text());
	});
}

Open in new window

jonatec

ASKER

Thanks great thanks.

Lastly then, what if I wanted to include not only the ID in the array but also the City Name, how would do that ?

ASKER CERTIFIED SOLUTION

Albert Van Halen

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

jonatec

ASKER

Yeah that's brilliant, I like the use of cells to pick specific table cells, nice.