var imgPath = "/img/index/";
var rollflag = 0;
	  
menuNames = new Array('goback','relatedmedia','home');
menuButtonsOn = new Array();
menuButtonsOff = new Array();

if ( document.images ) {
  for (n=0; n<menuNames.length; n++) {
	buttonName = menuNames[n];
	menuButtonsOn[buttonName] = new Image(); menuButtonsOn[buttonName].src = imgPath + buttonName + "-on.gif";
	menuButtonsOff[buttonName] = new Image(); menuButtonsOff[buttonName].src = imgPath + buttonName + "-off.gif";
  }
}

function ShowOff ( name ) {
  if (document.images)
  if (rollflag) {
	document.images[name].src = menuButtonsOff[name].src;
  }
}

function ShowOn ( name ) {
  if (document.images)
  if (rollflag) {
	document.images[name].src = menuButtonsOn[name].src;
  }
}