Get contents of php created div with variable id with JQuery

On my page I have a search form which generates a table for the results. In that table, each cells content is surrounded by a span tag with an ID based on the cells name and rows ID in the database. In addition the span gets a fixed class. Heres a printed example:

<td><span id="firstname_203" class="text">John</span></td>

What I am trying to do, is that when I hover the cell that contains the firstname, I want the firstname to appear on a different part of the page. I have tried the code below, but it only returns firstname=null:

( function($) {
    $(document).ready(function() 
    {
    $(".text").hover(function() 
    {
    var ID=$(this).attr('id');
    var firstname=$("#firstname_"+ID).html();
    $($(".firstname")).html("firstname="+firstname);
    });
});
} ) ( jQuery );

It's the ID part that doesn't work because if i hardcode the ID (e.g. "#firstname_203") it works just fine.

When I think about it, the only thing I need to know is how to get the php generated integer following the开发者_如何学运维 ID.

Update:

When adding more variables (this).text didn't work as it returned the whole rows values. Instead I had to use this:

$("#table td:nth-child(1)").hover(function(event){

and return the cells as:

var firstname= $td.eq(0).text();

and so on.

You can just skip the whole Id kerfuffle and go straight to the .html().

(function($) {
    $(document).ready(function() {
        $(".text").hover(function() {
            var firstname = $(this).html();
            $(".firstname").html("firstname=" + firstname);
        });
    });
})(jQuery);

Also, you could probably just get away with using .text()

EDIT:

Given this html

<div class="userDetails">
    <span class="fname">Barry</span>
    <span class="lname">Smith</span>
</div>

<div class="firstname">Firstname</div>
<div class="lastname">Lastname</div>

You could do:

(function($) {
    $(document).ready(function() {
        $(".userDetails").hover(function() {
            var firstName = $('.fname', this).text();
            var lastName = $('.lname', this).text();
            $(".firstname").html("firstname=" + firstName);
            $(".lastname").html("lastname=" + lastName);
        });
    });
})(jQuery);

I've created a jsFiddle for you - http://jsfiddle.net/HZRSW/