function showTR(id){
      if (document.getElementById && document.createTextNode)
    {
         var tr=document.getElementById(id);
			if (tr) {
					  if (tr.style.display == 'none') {
						// To make tr tags disappear
						// we set display to none, as usual
						// to make them appear again
						// we set style to block for IE
						// but for firefox we use table-row
						try {
						  tr.style.display='table-row';
						} catch(e) {
						  tr.style.display = 'block';
						}
					  }
					  else {
						tr.style.display = '';
					  }
					  }     
    }
}