function switch_tabs(id_tab, id_link)
{
 var lst_tr = document.getElementsByTagName("div");
 for (i=0; i<lst_tr.length; i++)
	{
	 if (lst_tr[i].id.substr(0,4) == "tab_")
		lst_tr[i].style.display = 'none';
	}
 var lst_tr = document.getElementsByTagName("a");
 for (i=0; i<lst_tr.length; i++)
	{
 	 if (lst_tr[i].id.substr(0,5) == "link_")
		lst_tr[i].className = "tab";
	}

 document.getElementById(id_tab).style.display = '';
 document.getElementById(id_link).className = "tab_active";
}

function switch_tabs_auto(id_tab, id_link)
{
 var lst_tr = document.getElementsByTagName("div");
 for (i=0; i<lst_tr.length; i++)
	{
	 if (lst_tr[i].id.substr(0,4) == "tab_")
		lst_tr[i].style.display = 'none';
	}
 var lst_tr = document.getElementsByTagName("a");
 for (i=0; i<lst_tr.length; i++)
	{
 	 if (lst_tr[i].id.substr(0,5) == "link_")
		lst_tr[i].className = "tab_auto";
	}

 document.getElementById(id_tab).style.display = '';
 document.getElementById(id_link).className = "tab_auto_active";
}