//The following functions activates & deactivates rollovers
            
function img_act(imgName){
  if (document.images) {
  imgOn = eval(imgName + "on.src");
  document [imgName].src = imgOn;
  }
}

function img_inact(imgName) {
  if (document.images) {
  imgOff = eval(imgName + "off.src");
  document [imgName].src = imgOff;
    }
  }
  
function img_act_id(imgName){
  if (document.getElementById) {
  	var btn = document.getElementById(imgName);
  	imgOn = eval(imgName + "on.src");
  	btn.src = imgOn;
    }
}

function img_inact_id(imgName) {
  if (document.getElementById) {
  	var btn = document.getElementById(imgName);
  	imgOff = eval(imgName + "off.src");
  	btn.src = imgOff;
    }
}
  
function img_change_id(btnId, imgName, status){
  if (document.getElementById) {
  	var btn = document.getElementById(btnId);
  	imgSource = eval(imgName + status + ".src");
  	btn.src = imgSource;
    }
}