function roundTable(objID) {
      var obj = document.getElementById(objID);
      var Parent, objTmp, Table, TBody, TR, TD;
      var bdcolor, bgcolor, Space;
      var trIDX, tdIDX, MAX;
      var styleWidth, styleHeight;

      // get parent node
      Parent = obj.parentNode;
      objTmp = document.createElement('SPAN');
      Parent.insertBefore(objTmp, obj);
      Parent.removeChild(obj);

      // get attribute
      bdcolor = obj.getAttribute('rborder');
      bgcolor = obj.getAttribute('rbgcolor');
      radius = parseInt(obj.getAttribute('radius'));
      if (radius == null || radius < 1) radius = 1;
      else if (radius > 6) radius = 6;

      MAX = radius * 2 + 1;
      
      /*
             create table {{
      */
      Table = document.createElement('TABLE');
      TBody = document.createElement('TBODY');

      Table.cellSpacing = 0;
      Table.cellPadding = 0;

      for (trIDX=0; trIDX < MAX; trIDX++) {
             TR = document.createElement('TR');
             Space = Math.abs(trIDX - parseInt(radius));
             for (tdIDX=0; tdIDX < MAX; tdIDX++) {
                    TD = document.createElement('TD');
                    
                    styleWidth = '1px'; styleHeight = '1px';
                    if (tdIDX == 0 || tdIDX == MAX - 1) styleHeight = null;
                    else if (trIDX == 0 || trIDX == MAX - 1) styleWidth = null;
                    else if (radius > 2) {
                           if (Math.abs(tdIDX - radius) == 1) styleWidth = '2px';
                           if (Math.abs(trIDX - radius) == 1) styleHeight = '2px';
                    }

                    if (styleWidth != null) TD.style.width = styleWidth;
                    if (styleHeight != null) TD.style.height = styleHeight;

                    if (Space == tdIDX || Space == MAX - tdIDX - 1) TD.style.backgroundColor = bdcolor;
                    else if (tdIDX > Space && Space < MAX - tdIDX - 1)  TD.style.backgroundColor = bgcolor;
                    
                    if (Space == 0 && tdIDX == radius) TD.appendChild(obj);
                    TR.appendChild(TD);
             }
             TBody.appendChild(TR);
      }

      /*
             }}
      */

      Table.appendChild(TBody);
      
      // insert table and remove original table
      Parent.insertBefore(Table, objTmp);
}