var cq="x0" // current quadrant -- set to default of null
// map offsets for databox displays
var map_offset_x = 205 // map x coord
var map_offset_y = 322 + 20// map y coord + cursor offset + room for cursor

var brow = (document.layers) ? "nn":"ie";
if (navigator.appName.indexOf("Netscape") > -1 && navigator.appVersion >= "5") brow = "compliant";
var show = (brow == "nn") ? "show":"visible"; // variables for browser specific VISIBILITY VALUES
var hide = (brow == "nn") ? "hide":"hidden"; //
// set up strings to build div objects...
switch (brow) {
	case 'nn':
		objHead = 'document.'
		objTail = ''
		map_str = 'document.mapimage.document.the_map'
		break;
	case 'ie':
		objHead = ''
		objTail = '.style'
		map_str = 'the_map'
		break;
	case 'compliant':
		objHead = 'document.getElementById("'
		objTail = '").style'
		map_str = 'document.getElementById("the_map")'
		break;
}

function display_toggle(the_obj, the_state, x_coord, y_coord) { // shows/hides layers
	this_str = objHead + the_obj + objTail;
	this_obj = eval(this_str);
	if (x_coord) {
		this_obj.left = x_coord + map_offset_x;
		this_obj.top = y_coord + map_offset_y;
	}
	this_obj.visibility = the_state;
}

function zoom_in(quadrant) {
	cq = quadrant;
	// swap image map
	display_toggle('outmap',hide);
	toggle_imap(show);
	// swap map for quadrant
	obj = eval(map_str);
	obj.src = 'bsmfl_images/trans.gif';
	obj.src = 'bsmfl_images/' + cq + '.gif';
	// toggle arrows
	arrow_toggle();
	// show zoom out btn
	display_toggle('zoombtnoff',hide);
	display_toggle('zoombtnon',show);
}

function zoom_out() {
	// swap image map
	display_toggle('outmap',show);
	toggle_imap(hide);
	cq = "x0";
	// swap map for quadrant
	obj = eval(map_str);
	obj.src = 'bsmfl_images/trans.gif';
	obj.src = 'bsmfl_images/map_zoomout.gif';
	// toggle arrows
	arrow_toggle();
	// hide zoom out btn
	display_toggle('zoombtnon',hide);
	display_toggle('zoombtnoff',show);
}

function open_print_box() {
	display_toggle('pdfbox',show);
	display_toggle('pdfmask',show);
}

function close_print_box() {
	display_toggle('pdfbox',hide);
	display_toggle('pdfmask',hide);
}

function pan(dir) {
	toggle_imap(hide);
	i = cq.substr(0,1);
	j = cq.substr(1);
	switch (dir) {
		case 0:
			cq = i + ((j - 0) - 1);
			break;
		case 1:
			cq = "b" + j;
			break;
		case 2:
			cq = i + ((j - 0) + 1);
			break;
		case 3:
			cq = "a" + j;
			break;
	}
	// swap map image
	obj = eval(map_str);
	obj.src = 'bsmfl_images/trans.gif';
	obj.src = 'bsmfl_images/' + cq + '.gif';
	arrow_toggle();
	toggle_imap(show);
}

function toggle_imap(tog_state) {
	display_toggle(cq + 'map',tog_state);
}

function arrow_toggle() {
	i = cq.substr(0,1);
	j = cq.substr(1);
	// toggle arrows
	for (l = 0; l < 4; l++) {
		offstate = hide;
		onstate = show;
		// check quadrant
		if (((l == 0 ) && (j == 1)) || ((l == 1) && (i =='b')) || ((l == 2) && (j == 3)) || ((l == 3) && (i == 'a')) || (cq == "x0")) {
			offstate = show;
			onstate = hide;
		}
		display_toggle('a' + l + 'off',offstate);
		display_toggle('a' + l + 'on',onstate);
	}
}