var window_status = new Array()

var images_loaded = null

window_status[0] = "UCSF homepage"
window_status[1] = "o'shea lab  >  p r o j e c t s"
window_status[2] = "o'shea lab  >  p e o p l e"
window_status[3] = "o'shea lab  >  p u b l i c a t i o n s"
window_status[4] = "o'shea lab  >  a f f i l l i a t i o n s"
window_status[5] = "o'shea lab  >  f u n   s t u f f"
window_status[6] = "o'shea lab  >  c o n t a c t   u s"
window_status[7] = "o'shea lab  >  e x t r a n e t"
window_status[8] = "o'shea lab  >  i n t r a n e t"
window_status[9] = "o'shea lab  >  h o m e   p a g e"

if (document.images) {
		var on_ucsf = new Image();
		var off_ucsf = new Image();
		var on_red_r_1 = new Image();
		var on_red_r_2 = new Image();
		var on_red_r_3 = new Image();
		var on_red_r_4 = new Image();
		var on_red_r_5 = new Image();
		var off_red_r_1 =  new Image();
		var off_red_r_2 =  new Image();
		var off_red_r_3 =  new Image();
		var off_red_r_4 =  new Image();
		var off_red_r_5 =  new Image();
		var on_blue_right =  new Image();
		var off_blue_right =  new Image();
		var on_lab_home_right =  new Image();
		var off_lab_home_right =  new Image();
}

function load_images(which) {
	if (document.images) {
		images_loaded = 1;
		if (which == "internal") {
			off_red_r_1.src = "../img/i_r03_c1.gif";
			off_red_r_2.src = "../img/i_r03_c2.gif";
			off_red_r_3.src = "../img/i_r03_c5.gif";
			off_red_r_4.src = "../img/i_r03_c6.gif";
			off_red_r_5.src = "../img/i_r03_c8.gif";
			off_blue_right.src = "../img/i_r06_c3.gif";
			off_ucsf.src = "../img/h_r01_c03.gif";
			off_lab_home_right.src = "../img/i_r09_c3.gif";
			on_red_r_1.src = "../img/i_h_r03_c1.gif";
			on_red_r_2.src = "../img/i_h_r03_c2.gif";
			on_red_r_3.src = "../img/i_h_r03_c5.gif";
			on_red_r_4.src = "../img/i_h_r03_c6.gif";
			on_red_r_5.src = "../img/i_h_r03_c8.gif";
			on_blue_right.src = "../img/i_h_r06_c3.gif";
			on_ucsf.src = "../img/hh_r01_c03.gif"
			on_lab_home_right.src = "../img/i_h_r09_c3.gif";
			}	
	if (which == "internal_level2") {
			off_red_r_1.src = "../../img/i_r03_c1.gif";
			off_red_r_2.src = "../../img/i_r03_c2.gif";
			off_red_r_3.src = "../../img/i_r03_c5.gif";
			off_red_r_4.src = "../../img/i_r03_c6.gif";
			off_red_r_5.src = "../../img/i_r03_c8.gif";
			off_blue_right.src = "../../img/i_r06_c3.gif";
			off_ucsf.src = "../../img/h_r01_c03.gif";
			off_lab_home_right.src = "../../img/i_r09_c3.gif";
			on_red_r_1.src = "../../img/i_h_r03_c1.gif";
			on_red_r_2.src = "../../img/i_h_r03_c2.gif";
			on_red_r_3.src = "../../img/i_h_r03_c5.gif";
			on_red_r_4.src = "../../img/i_h_r03_c6.gif";
			on_red_r_5.src = "../../img/i_h_r03_c8.gif";
			on_blue_right.src = "../../img/i_h_r06_c3.gif";
			on_ucsf.src = "../../img/hh_r01_c03.gif"
			on_lab_home_right.src = "../../img/i_h_r09_c3.gif";
			}
		if (which == "home") {
			off_red_r_1.src = "img/h_r04_c03.gif";
			off_red_r_2.src = "img/h_r06_c03.gif";
			off_red_r_3.src = "img/h_r08_c03.gif";
			off_red_r_4.src = "img/h_r10_c03.gif";
			off_red_r_5.src = "img/h_r12_c03.gif";
			off_blue_right.src = "img/h_r14_c10.gif";
			off_ucsf.src = "img/h_r01_c03.gif";
			off_lab_home_right.src = "/img/i_r09_c3.gif";
			on_red_r_1.src = "img/hh_r04_c03.gif";
			on_red_r_2.src = "img/hh_r06_c03.gif";
			on_red_r_3.src = "img/hh_r08_c03.gif";
			on_red_r_4.src = "img/hh_r10_c03.gif";
			on_red_r_5.src = "img/hh_r12_c03.gif";
			on_blue_right.src = "img/hh_r14_c10.gif";
			on_ucsf.src = "img/hh_r01_c03.gif"
			on_lab_home_right.src = "/img/i_h_r09_c3.gif";
			}
		}
	}

function red(direction, which_link) {
	if (direction == "on") {
		window.status = window_status[which_link];
		}
	else {
		window.status = "";
		}
	if (images_loaded) {
 	img_source = eval(direction + "_red_r_" + which_link + ".src");
 	target_img = "red_" + which_link;
		document.images[target_img].src = img_source;
		}
	}

function blue(direction, which_link) {
	if (direction == "on") {
		window.status = window_status[which_link];
		}
	else {
		window.status = "";
		}
	if (images_loaded) {
 	img_source = eval(direction + "_blue_right.src");
 	target_img = "blue_" + which_link;
		document.images[target_img].src = img_source;
		}
	}

function ucsf(direction, which_link) {
	if (direction == "on") {
		window.status = window_status[which_link];
		}
	else {
		window.status = "";
		}
	if (images_loaded) {
 	img_source = eval(direction + "_ucsf.src");
 	target_img = "ucsf_" + which_link;
		document.images[target_img].src = img_source;
		}
	}

function lab_home(direction, which_link) {
	if (direction == "on") {
		window.status = window_status[which_link];
		}
	else {
		window.status = "";
		}
	if (images_loaded) {
 	img_source = eval(direction + "_lab_home_right.src");
 	target_img = "lab_home_" + which_link;
		document.images[target_img].src = img_source;
		}
	}