function overImage(info){  
  elem = document.getElementById(info);
  elem.style.display = "block";

}
function outImage(info){
  elem = document.getElementById(info);
  elem.style.display = "none";
}

function transOff(id){
document.getElementById(id).style.filter ='alpha(opacity=100)';

}
function transOn(id){
document.getElementById(id).style.filter ='alpha(opacity=50)';

}