How to add "id" attribute to <TR>

Yea.. I have done this.. Actually.. it wld be better if u override addRowId method of display tag,Performce wise it wld b better than javascript.I am giving both the examples u can use any1 of ur choice..

Override addRowID()

<%request.setAttribute("dyndecorator", new org.displaytag.decorator.TableDecorator()
{
public String addRowId()
{
return "" + evaluate("rowId");
}

                                     });
                                   %>

Here they have use concept of inner class rowID is any property u want to keep as id which wld b unique.. if not then set a bean property as a counter..just mention display:table decorator ="dyndecorator"

Using jaavscript
Thsi is however simple to understand bt u can check the perforemace.Basically this function wld go in onload f the page.
where detailRow is the id of the display table id attribute

var tab=document.getElementById('detailRow');
if(tab!=null){
var tbody = tab.getElementsByTagName("tbody")[0];
var tabRows=tbody.getElementsByTagName("tr");

        for(var i=0;i<tabRows.length;i++){
            var row=tabRows.item(i);
            var check=row.getElementsByTagName("input")[0];
            var rowId=check.value;
            row.setAttribute("id",rowId);
    }
     }