function ap_showContent(tab) {
	// turn off other tabs
	for (var i = 1; i <= ap_numTabs; i++) {
		if (i != tab) {
			$('ap_box_tab_' + i).className = "item";
			$('ap_box_content_' + i).style.display = "none";
		}
	}
	// turn on target tab
	$('ap_box_tab_' + tab).className = "item_on";
	$('ap_box_content_' + tab).style.display = "block";
}

function ap_init() {
	ap_numTabs = 3;
	ap_showContent(ap_dt);
}

// add to list of functions which run on window load
womAdd('ap_init()');