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 ) {
				div_elem.style.display = 'block';
				tab_elem.className = 'selected';
			} else {
				div_elem.style.display = 'none';
				tab_elem.className = '';
			}
		}
	}
}