function ng2(src,alt,id) {
	
	var sourceBigPic = document.getElementById('ngprojectImagebig').src;
	var oldalt = document.getElementById('textContainer').innerHTML;
	
	document.getElementById('ngprojectImagebig').src = src;
	document.getElementById('textContainer').innerHTML = alt;
	
	document.getElementById(id).src = sourceBigPic;
	document.getElementById(id).alt = oldalt;
	
}