var data_arr_four = new Array(
{ ad_image:'/filebin/ads/zipcar_100.gif', page_url:'http://www.zipcar.com', display_seconds:'5000' },
{ ad_image:'/filebin/ads/Zacuto_100.gif', page_url:'http://www.zacuto.com', display_seconds:'5000' },
{ ad_image:'/filebin/ads/Illinois_Film_Office_100.gif', page_url:'http://www.commerce.state.il.us/dceo/Bureaus/Film/', display_seconds:'5000' }						 );
var ad_four = $("ad_four") ;
ad_four_counter = -1;
ad_four_automate();
function ad_four_automate() {
	ad_four_counter = ad_four_get_index();
	ad_four.innerHTML = "<a href=\""+data_arr_four[ad_four_counter].page_url+"\" target=\"_blank\"><img src=\""+data_arr_four[ad_four_counter].ad_image+"\" /></a>";
	window.setTimeout("ad_four_automate()", data_arr_four[ad_four_counter].display_seconds);
}
function ad_four_get_index() {
	if ((ad_four_counter+1) < data_arr_four.length) return ad_four_counter+=1;
	return 0;
}