Good Day All

i am creating Textboxes at Runtime with something like this

Code:
Dim cnt As New TextBox
     
        cnt.ID = "cont_" & x
 
        If multiline Then
            cnt.TextMode = TextBoxMode.MultiLine
 

        End If
These are dynamically created fields. so what i want to do is to use this following JQuery on this textbox

Code:
$(document).ready(function()
{
        $("#contentbox").keyup(function()
        {
        var box=$(this).val();
        var main = box.length *100;
        var value= (main / 145);
        var count= 145 - box.length;
 
        if(box.length <= 145)
        {
        $('#count').html(count);
        $('#bar').animate({"width": value+'%',}, 1);
        }
        return false;
        });
 
});
and what this function does it count the number of Characters that have been typed in a Textbox. so i am displaying the remaining characters. So that is working fine on my example because the Element is known at Early Binding. Now my question is what if the textbox is created dynamically ?

content-box
.

this is the name of the Textbox in my example.

hOW do we use a J Query in Dynamically created Textbox.


Thanks