function show_right_img(img_base, tab_base, tab) {
	// assumes no more than 3 panels in set
	panel_1 = document.getElementById(img_base+'1');
	panel_2 = document.getElementById(img_base+'2');
	panel_3 = document.getElementById(img_base+'3');
	current_panel = document.getElementById(img_base+tab);
	
	tab_1 = document.getElementById(tab_base+'1');
	tab_2 = document.getElementById(tab_base+'2');
	tab_3 = document.getElementById(tab_base+'3');
	current_tab = document.getElementById(tab_base+tab);
	
	
	if (panel_1) {
		panel_1.style.display = "none";
	}
	if (panel_2) {
		panel_2.style.display = "none";
	}
	if (panel_3) {
		panel_3.style.display = "none";
	}
	
	current_panel.style.display = "block";
	
	if (tab_1) {
		tab_1.className = "right_tab right_tab_top";
	}
	if (tab_2) {
		tab_2.className = "right_tab";
	}
	if (tab_3) {
		tab_3.className = "right_tab";
	}
	if (tab == '1') {
		current_tab.className = "right_tab right_tab_top_on";
	}
	else {
		current_tab.className = "right_tab right_tab_on";
	}
}