function toggle(id, img) {
	var el = eval('document.getElementById("'+id+'_before")');
	var image = '/common/images/projects/'+img+'_before.jpg';
	el.src = image;
	var e2 = eval('document.getElementById("'+id+'_after")');
	var image2 = '/common/images/projects/'+img+'_after.jpg';
	e2.src = image2;
}
function show_content(id, content_id) {
	var el = eval('document.getElementById("'+id+'")');
	var content = eval('document.getElementById("'+content_id+'")');
	el.innerHTML = content.innerHTML;
}