function show_tab(elm, tabbox_name, tab) {
	if(tabboxes[tabbox_name]) {
		for(i=0; i<tabboxes[tabbox_name].length; i++) {
			if(tabboxes[tabbox_name][i]==tab) {
				$(tabboxes[tabbox_name][i]).className = 'tab_selected';

				$(tabbox_name).value = elm.innerHTML;


			 } else {
				$(tabboxes[tabbox_name][i]).className = 'tab_hidden';
			}
		}
	}
}