/**
* 
*/
function imgColori(obj)
{
	var obj_id_bn = document.getElementById(obj.id + '_img_bn');
	var obj_id_col = document.getElementById(obj.id + '_img_col');
	var obj_text = document.getElementById(obj.id + '_text');
	obj_id_bn.className = "voce_img_hidden";
	obj_id_col.className = "voce_img";
	obj_text.style.visibility = "visible";
}

/**
* 
*/
function imgBN(obj)
{
	var obj_id_bn = document.getElementById(obj.id + '_img_bn');
	var obj_id_col = document.getElementById(obj.id + '_img_col');
	var obj_text = document.getElementById(obj.id + '_text');
	obj_id_bn.className = "voce_img";
	obj_id_col.className = "voce_img_hidden";
	obj_text.style.visibility = "hidden";
}