$(function(){
	
	var btn_left = $('#envi_arrow_right > img');
	var btn_right = $('#envi_arrow_left > img');
	var showPhoto = $('img','#photoframe');

	var btn_thum = $('img','#entr_thum');
	$(btn_thum[0]).fadeTo('fast', 0.5);
	btnThum(btn_thum,showPhoto);
	btnNext(btn_left,showPhoto);
	
});

function btnThum(ell,photo){
	var theThumBtn = ell;
	var thePhoto = photo;

	for(i=0; i<theThumBtn.size(); i++){
		$(theThumBtn[i]).click(function(){
			$(theThumBtn).fadeTo('fast', 1);
			var switchImg = $(this).attr('src');
			switchImg = switchImg.replace('thum','');
			$(thePhoto).attr('src',switchImg);
			$(this).fadeTo('fast', 0.5);
			
		});
	}
}

function btnNext(ell,photo){
	var theBtnLef = ell;
	var thePhoto = photo;
	
	var nowImg = $();
	$(theBtnLef).click(function(){
		$(thePhoto).attr('src',switchImg);
	});
	

}