/*
function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

var preloadFlag = false;
function preloadImages(father_folder) {
  if(father_folder == null)
  	father_folder = "";
  else
  	father_folder += "/";
  	
  if (document.images) {
    menuHome = newImage(father_folder+"images/menuHome.gif");
    menuHomeOver = newImage(father_folder+"images/menuHomeOver.gif");

    preloadFlag = true;
  }
}
*/

var firstMenuImg ="";

function menuOver(obj){	
	//obj.src = "images/"+obj.name+"Over.gif";
	firstMenuImg = obj.src;
	var objStr = obj.src;
	if(!isOverImg(objStr)){
		var ext = objStr.substring(objStr.length-4,objStr.length);
		var newObjStr = objStr.substring(0,objStr.length-4) + "Over"+ ext;
		obj.src = newObjStr;
	}
}

function menuOut(obj){
	//obj.src = "images/"+obj.name+".gif";
	if(!isOverImg(firstMenuImg)){
		var objStr = obj.src;
		var ext = objStr.substring(objStr.length-4,objStr.length);
		var newObjStr = objStr.substring(0,objStr.length-8) + ext;	
		obj.src = newObjStr;
	}
	firstMenuImg ="";
}

function isOverImg(objSrc){
	var regExp = new RegExp("Over");
	var isOver =  regExp.test(objSrc);
	return isOver;
}