how do i get data back from a function call to javascript function back to asp .net

i have a listview control and it will fire a javascript call
function HighlightRow(nListID)
                  {
                        if (document.getElementById("lv_chk_lvi_" + nListID).checked==true)
                              document.getElementById("lv_row_" + nListID).style.backgroundColor='#ccccff';
                        else
                              document.getElementById("lv_row_" + nListID).style.backgroundColor='#ffffff';
                  }
when in asp .net i have this
ListItem.CheckBoxDHTML = "onclick=javascript:HighlightRow('#LVI#')"

what i want to do is when i select a button. and call a function thats javascript that will go in and return the values of the checked items on the asp.net listview control.

i want to basically end up returning an array of values from a a javascript function that will tell me which IDs of the listview have been selected.
godcomputerAsked:
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JerSchneidCommented:
Are these checkboxes in your ListView that the user is clicking?

Will the user eventually click a "submit" or "save" button that will post back to the page?

If so, you can just loop through the rows in the ListView and check if each checkbox was checked when the user clicked the submit button.

For example:

for (int i = 0; i < _myListView.Items.Count; i++)
{
      if (((CheckBox)_myListView.Items[i].FindControl("_myCheckBoxInListViewRow")).Checked)
            //This checkbox was checked, so do something
}
godcomputerAuthor Commented:
the checkboxes are being created from a serverside control with a .write to the document page so for some reason i cant use findcontrol? its not finding my items.
JerSchneidCommented:
Ok...  If you're dynamically creating them by writing them to the page findControl won't work.

You could consider using the asp:CheckBox control instead of writing the checkbox HTML to the page.

If you're not using ASP.Net controls, you can always go through the Form variables manually like this:

foreach (string formID in Request.Form.AllKeys)
{
      if (Request.Form[formID] == "true")
      {
            //Do something here
      }
}

You'll have to parse the formID to see if it is the checkbox that you care about or another control.  I'm actually not sure if it will post "true" or "1" or what.

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