function imgOverEffect(object) {
  	if (object.className != 'imgOverEffect') 
  	{
  		//object.className = 'imgOverEffect';
		var str= String(object.src);	
		str = str.replace(".png", "2.png");
		object.src= str;
	}
}

function imgOutEffect(object) {
  	if (object.className != 'imgOutEffect')
    {
		//object.className = 'imgOutEffect';	
		var str= String(object.src);	
		str = str.replace("2.png", ".png");
		object.src= str;
	}
}