Javascript - get all table -> tr values

var rows = document.getElementsByTagName("table")[0].rows;
var last = rows[rows.length - 1];
var cell = last.cells[0];
var value = cell.innerHTML

Try it yourself here: http://jsfiddle.net/ReyNx/.

Obviously you'll have to change document.getElementsByTagName("table")[0] to appropriately match your table

If you're using jQuery it's easier:

var value = $('table tr:last td').text();

For more info, see the MDN DOM reference, which shows you which properties are available on which elements to traverse the DOM.

If like me you want to get the text from all the first column items in all the tables on the page then use this.

jQuery('table tr td').each( function( cmp ) { 
    console.log( jQuery(this).text() ); 
} );

Assuming you're using vanilla Javascript (no libraries such as jQuery), and that this is the only table on the page, you can use the following code to select the third tr in the table, then find out what the td element contains

var table = document.getElementsByTagName("table")[0];
var emailTr = table.rows[2];
var emailTd = emailTr.cells[0];
var email = emailTd.innerHTML;

jQuery would make this easier

var email = $("table").children("tr:eq(2)").children("td").html();

No jQuery, innerHtml or other evil / heavy functions, just plain old JavaScript:

// Get the first table in the document.
var table = document.getElementsByTagName('table')[0];
// Get the third row of this table (0-index 3rd = 2)
var emailRow = table.rows[2];
// Get this element's content.
var emailContent = emailRow.firstChild.textContent;

You could write it in 1 line:

var emailContent = document.getElementsByTagName('table')[0].rows[2].firstChild.textContent;

---

If you want to find all email addresses in a table:

var emails = [];
var table = document.getElementsByTagName('table')[0];
var rows = table.rows;
for (var i = 0; i < rows.length; i++) {
    var rowText = rows[i].firstChild.textContent;
    if (~rowText.indexOf('@')) { // If the content of the row contains a '@' character (This could be replaced with a regex check)
            // Also, I personally prefer to use '~' over '> -1' for indexOf(), but both would work.
        emails.push(rowText);
    }
}
console.log(emails);

Working example