myBeforeID = "";
myOP = window.opera;
myN6 = document.getElementById;
myIE = document.all;
myN4 = document.layers;
if      (myOP) myBR="N6";
else if (myIE) myBR="I4";
else if (myN6) myBR="N6";
else if (myN4) myBR="N4";
else           myBR="";

function myBrowserObj(myID){
  if (myBR=="N6") myRet=document.getElementById(myID).style;
  else if (myBR=="I4") myRet=document.all[myID].style;
  else if (myBR=="N4") myRet=document[myID];
  else myRet=0;
  return myRet;
}
function myIn(myID){
  if (myBeforeID != ""){
    myObj.visibility = "hidden";
  }
  myBeforeID = myID;
  myObj = myBrowserObj(myID);
  if(myObj){
    myObj.visibility = "visible";
  }
}