function show(rownum) {
   if(document.getElementById) {
      var rownumid = document.getElementById(rownum).style;

      if(navigator.userAgent.indexOf("Firefox") != -1){
      	  rownumid.display = "block";
      }
      else {
	      rownumid.display = "block";
      }
      return false;
   }
   else {
      return true;
   }
}

function hide(rownum) {
   if(document.getElementById) {
      var rownumid = document.getElementById(rownum).style;

      if(navigator.userAgent.indexOf("Firefox") != -1){
      	  rownumid.display = "none";
      }
      else {
	      rownumid.display = "none";
      }
      return false;
   }
   else {
      return true;
   }
}