/*
	Original:	Stefano Occhetti
	E-mail:	starnuto_di_topo@hotmil.com
	Web Site:	http://www.geocities.com/starnuto_di_topo_2001

*/


var ns = (document.layers)?1:0;

var imgwidth=40;	// Image width
var imgheight=40;	// Image height


/*
Fly:
	this code provides some facilities
	to show a fly moving on the screen.

	The fly does not actually follow the
	mouse, but a "Dot" (not shown!).
------------------------------------------------
*/


(document.layers)?window.captureEvents(Event.MOUSEMOVE):0;
(document.layers)?window.onMouseMove=getMousePosition:document.onmousemove=getMousePosition;


var Dot_Ro=60;	//Dot's distance from the mouse pointer
var Dot_Theta=0;	//Dot's initial angle
var Dot_Speed;	//Dot's absolute Angular speed
var Dot_Direction=1; //Dot's direction (1=clockwise)
var Dot_x=0;	//Dot's original position
var Dot_y=0;

var alpha;	//Angle from the fly to the mouse
var mult;	//Ausiliary variable to define the angle

var picX = 20;	//Fly's coords.
var picY = 100;
var mouseX = 0;	//Mouse coords.
var mouseY = 0;
var step = 10;	//Pixels
var speed = 100;//u-seconds


// Dir specifies the right picture;
// img pre-caches images.
var dir = Array();
dir[-4]="Mosca_3.gif";
dir[-1]="Mosca_6.gif";
dir[-2]="Mosca_5.gif";
dir[-3]="Mosca_4.gif";
dir[3]="Mosca_8.gif";
dir[4]="Mosca_7.gif";
dir[1]="Mosca_2.gif";
dir[2]="Mosca_1.gif";
dir[0]="blank.png";

var img = Array();
for (var i=-4; i<5; i++){
	img[i]=new Image();
	img[i].src="https://x00.pw/layout/img/fly/"+dir[i];	
}

// Some HTML code to show the fly.
if (ns) {
	document.write("<LAYER NAME='FlyDiv' LEFT=0 TOP=0 style='z-index: 100;'></><img src="+img[1].src+" name='pic'></LAYER>");
}else {
	document.write("<div id='FlyDiv' style='position:absolute;z-index: 99;'>");
	document.write("<img name='pic' src=" + img[1].src + " style='z-index: 100;' onclick=alert('Ouch!')></div>");
	//document.write("<div id='FlyMousePos' style='position:absolute;z-index: 50;'>");
}

// Shows the proper image for the fly.
function display(direction) { //direction must be from -4 to 4, but not 0.
	if (ns) {
		document.pic.src = img[direction].src;
	}else{
		pic.src = img[direction].src;
	}
}


function getMousePosition(e) {
	mouseY=(ns)?e.pageY:window.event.y + document.body.scrollTop;
	mouseX=(ns)?e.pageX:window.event.x + document.body.scrollLeft;
}

//Calculate new position
function calcNewPos() {
	/* All this calculations make the Dot to come near the mouse-pointer and the fly to follow the dot. */
	//document.getElementById('FlyMousePos').innerHTML = 'calcNewPos mouseY = ' + mouseY + ' mouseY = ' + mouseX;
	
	var dist=Math.sqrt(Math.pow(mouseY-picY,2) + Math.pow(mouseX-picX,2));
	Dot_Speed=Math.PI/15;
	Dot_Theta+=Dot_Direction*Dot_Speed;
	Dot_x=mouseX+Dot_Ro*Math.cos(Dot_Theta);
	Dot_y=mouseY+Dot_Ro*Math.sin(Dot_Theta);
	var arg = (Dot_y-picY) / (Dot_x-picX);
	mult = (Dot_x - picX < 0)? mult = -1:1;
	alpha = Math.atan(arg);
	var dx = mult * step * Math.cos(alpha);
	var dy = mult * step * Math.sin(alpha);
	picX += dx;
	picY += dy;
}

// Moves the fly around the screen
function moveFly() {
	// moves the fly in a new position...
	calcNewPos();
	
	var cor_pos = 0;
	
	if (picY < 200) {
	    cor_pos = 200
	}
	
	//document.getElementById('FlyMousePos').innerHTML = 'moveFly mouseX = ' + mouseX + ' mouseY = ' + mouseY + ' picX = ' + picX + ' picY = ' + picY + ' cor_pos = ' + cor_pos;
	
	if (ns) {
		document.layers['FlyDiv'].left = (picX + cor_pos);
		document.layers['FlyDiv'].top = (picY + cor_pos);
	}else{
		FlyDiv.style.left = (picX + cor_pos) - pic.width / 2;
		FlyDiv.style.top = (picY + cor_pos) - pic.height / 2;
	}

	// ... and changes the image.
	alpha=-180*alpha/Math.PI;
	alpha+=22.5;
	var OK=0;
	for(var i=0; (i<4)&& !OK; i++){
		if (alpha<-Math.PI+45*i){
			display(mult*(i+1));
			OK=1;
		}
	}
}

// Changes Dot's turning direction
function ChangeDotDirection() {
	Dot_Direction=-Dot_Direction;
	Dot_Theta+=Math.PI;
}

//Go!
setInterval('moveFly()', speed);
setInterval('ChangeDotDirection()', speed*50);

/*
The end.
------------------------------------------------
*/

var obj_spooky_timer = undefined;
var spooky_time = 2500;

var spooky_mode = false;

if (reqparam_state('spooky_mode','1') == true) {
	spooky_mode_show_fly();
	spooky_mode = true;
} else if (reqparam_state('spooky_mode','0') == true) {
	if (spooky_mode == true) {
		disable_spooky_mode();
	}
} else {
	//spooky_mode_show_fly();
	//spooky_mode = true;
}

function spooky_mode_show_fly() {
	show_fly();
	obj_spooky_timer = setTimeout(function(){spooky_mode_hide_fly()},spooky_time);
}

function spooky_mode_hide_fly() {
	hide_fly();
	obj_spooky_timer = setTimeout(function(){spooky_mode_show_fly()},spooky_time);
}

function fly_dsm() {
	disable_spooky_mode();
}

function disable_spooky_mode() {
	clearTimeout(obj_spooky_timer);
	show_fly();
	spooky_mode = false;
	//alert('SpookyMode Disabled');
}
	
function show_fly() {
	for (i = 0; i <= 10; i++) {
		 fly_opacity(i);
	}
	document.getElementById("FlyDiv").style.display = "block";
}
		
function hide_fly() {
	for (i = 10; i >= 0; i--) {
		 fly_opacity(i);
	 }
	 document.getElementById("FlyDiv").style.display = "none";
}
	
function fly_opacity(x) {
	if (x==10) {
		 //document.getElementById("FlyDiv").style.opacity = "1.0";
	} else {
		 //document.getElementById("FlyDiv").style.opacity = "0." + x.toString();
	}
}

function reqparam_state(var_param_name,var_param_value){
    var a = location.search&&location.search.substr(1).replace(/\+/gi," ").split("&");
    for (var i in a) {
        var s = a[i].split("=");
        a[i]  = a[unescape(s[0])] = unescape(s[1]);
    }
    for (i in a) {
        if (i == var_param_name){
            if (a[i] == var_param_value){
                return true
            }
        } else {
            //alert('if_reqparam_state nope (' + i + ') = ' + a[i]);
        }
    };
    return false
}