Javascript-Popup window not return value

HI,

Popup Window not returning the value in gridview paging
in first page wen i select rows it returning but its not return on next paging

here code goes..
Page1.aspx

function showPopUp(row)
{
    var rVal = row.parentNode.parentNode;
    var arr = window.showModalDialog("");
   if(arr!=null)
    {
     //..Code..//
       var code= rVal.cells[1].getElementsByTagName("input")
       
       if(code[0].type=='text')   
       {
         code[0].value=arr[0];
       }
       //..Name..//
        var name= rVal.cells[2].getElementsByTagName("input")
       if(name[0].type=='text')   
       {
         name[0].value=arr[1];
       }
    return true;
    }
    else
    {
    return false
    }
}

Page2.aspx

 function SelectData(row)
    {
    var arRet=new Array();
    var uval=row.parentNode.parentNode;
      var code=uval.cells[1].innerHTML;
      var name=uval.cells[2].innerHTML;
           
      arRet[0]=code;
      arRet[1]=name;
      window.returnValue = arRet;
     window.close();
      }

Regards
Macki