function switch_divs(div_list, tab_list, selected_index) {
	for(i = 0; i < div_list.length; i++) {
		div_elem = document.getElementById(div_list[i]);
		tab_elem = document.getElementById(tab_list[i]);
		if (div_elem && tab_elem) {
			if (i == selected_index) {
				check_selected = new RegExp('\\bselected\\b').test(tab_elem.className);
				if (check_selected) {
					div_elem.style.display = 'none';
					tab_elem.className = tab_elem.className.replace(/selected/i, '');
				} else {
					div_elem.style.display = 'block';
					tab_elem.className = 'selected ' + tab_elem.className;
				}
			} else {
				div_elem.style.display = 'none';
				tab_elem.className = tab_elem.className.replace(/selected/i, '');
			}
		}
	}
}