var roll = document.images != null;

if (roll && navigator.userAgent.indexOf("Mozilla", 0) != -1){
    document.onmouseover = mouseover;
    document.onmouseout = mouseout;}


function mouseover(){ 
     if(window.event.toElement.tagName=="INPUT" || 
        window.event.toElement.tagName == "TEXTAREA" ||
        window.event.toElement.tagName == "SELECT"){
    window.event.toElement.style.background = "#dfdfdf";}
}

function mouseout(){
  if(window.event.fromElement.tagName == "INPUT" ||
     window.event.fromElement.tagName == "TEXTAREA" ||
     window.event.fromElement.tagName == "SELECT"){
     window.event.fromElement.style.background = "#f0f0f0";}
}