function chooseBlock(id,imgPath) {
	var td1 = "tdBg" + id;
	var img1 = "img" + id;
	var cont1 = "tab_container"+ id;
	if (id == 1){
		id = 2;
		
		imga = "tab-a-r.gif";
		imgna = "tab-na-r.gif";
	} else {
		id = 1;
		imgna = "tab-a-r-2.gif";
		imga = "tab-na-r-2.gif";
	}
	var td2 = "tdBg" + id;
	var img2 = "img" + id;
	var cont2 = "tab_container"+ id;


	document.getElementById(td1).className="active2";
	document.getElementById(img1).src=imgPath+imga;

	document.getElementById(td2).className="nactive";
	document.getElementById(img2).src=imgPath+imgna;

	document.getElementById(cont1).style.display='block';
	document.getElementById(cont2).style.display='none';
}