//functions for alien
function getwindowsize() {
clearTimeout(id1);
clearTimeout(id2);
clearTimeout(id3);
if (isNS) {
wwidth = window.innerWidth - 55;
wheight = window.innerHeight - 50;
} else {
wwidth = document.body.clientWidth - 55;
wheight = document.body.clientHeight - 50;
}
id3 = setTimeout('randomdir()', 20000);
animate();
}
function randomdir() {
if (Math.floor(Math.random()*2)) {
(Math.floor(Math.random()*2)) ? xdir='--': xdir='++';
} else {
(Math.floor(Math.random()*2)) ? ydir='--': ydir='++';
}
id2 = setTimeout('randomdir()', 20000);
}
function animate() {
eval('x'+xdir);
eval('y'+ydir);
if (isNS) {
pic1.left = x+pageXOffset;
pic1.top = y+pageYOffset;
} else {
pic1.pixelLeft = x+document.body.scrollLeft;
pic1.pixelTop = y+document.body.scrollTop;
}
if (isNS) {
if (parseInt(pic1.top) <= 5+pageYOffset) ydir = '++';
if (parseInt(pic1.top) >=wheight+pageYOffset) ydir = '--'; 
if (parseInt(pic1.left) >= wwidth+pageXOffset) xdir = '--';
if (parseInt(pic1.left) <= 5+pageXOffset) xdir = '++';
} else {
if (pic1.pixelTop <= 5+document.body.scrollTop) ydir = '++';
if (pic1.pixelTop >= wheight+document.body.scrollTop) ydir = '--';
if (pic1.pixelLeft >= wwidth+document.body.scrollLeft) xdir = '--';
if (pic1.pixelLeft <= 5+document.body.scrollLeft) xdir = '++';
}
id1 = setTimeout('animate()', 30);
}
//functions for astronut and stars
function star() {
for (i = 0; i <= no; i = i+4) {
xval[i] +=5;
if ((i%20) == 0) xval[i] += 10;
if(xval[i] >= Wwidth)  xval[i] = Wwidth * Math.random();
document.getElementById("div" + i).style.left = xval[i];
}
return true;
}
function goangle() {
angle = 3.14 * Math.random();
xinc = 3 * Math.sin(angle);
return true;
}
function space() {
document.getElementById("diva").style.left = xp;
document.getElementById("diva").style.top = yp;

xp += xinc;
yp +=yinc;
star();
if ((xp >= (Wwidth - 50)) || (xp <= 10))  { goangle();  xinc = (-1) * xinc; }
if ((yp >= (Hheight - 50)) || (yp <= 10)) {  goangle(); yinc = (-1) * yinc; }
setTimeout('space()', speed);
}