Vliegende sterren op de achtergrond

Vliegende sterren op de achtergrond

Een heel leuk achtergrondeffect! sterren komen naar voren gevlogen

Plaats het script tussen de <body> tags van je pagina

<SCRIPT language=JavaScript1.2>
<!-- Begin
var no = 50;
var speed = .001;
var ns4up = (document.layers) ? 1 : 0;
var ie4up = (document.all) ? 1 : 0;
var s, x, y, sn, cs;
var a, r, cx, cy;
var i, doc_width = 800, doc_height = 600;
if (ns4up) {
	doc_width = self.innerWidth;
	doc_height = self.innerHeight;
}
else if (ie4up) {
	doc_width = document.body.clientWidth;
	doc_height = document.body.clientHeight;
}
x = new Array();
y = new Array();
a = new Array();
r = new Array();
s = new Array();
sn = new Array();
cs = new Array();
cx = doc_width/2;
cy = doc_height/2;
s = 8;

for (i = 0; i < no; ++ i) {  
	initStar();
	if (ns4up) {
		if (i == 0) {
			document.write("<layer name=\"dot"+ i +"\" left=\"1\" ");
			document.write("top=\"1\" visibility=\"show\">");
			document.write("<font size=\"+1\">.</font></layer>");
		}
		else {
			document.write("<layer name=\"dot"+ i +"\" left=\"1\" ");
			document.write("top=\"1\" visibility=\"show\">");
			document.write("<font size=\"+1\">.</font></layer>");
	   }
	}
	else if (ie4up) {
		if (i == 0) {
			document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
			document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
			document.write("visible; TOP: 15px; LEFT: 15px;\">");
			document.write("<font size=\"+1\">.</font></div>");
		}
		else {
			document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
			document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
			document.write("visible; TOP: 15px; LEFT: 15px;\">");
			document.write("<font size=\"+1\">.</font></div>");
		}
	}
}
function initStar() {
	a[i] = Math.random() * 360;
	r[i] = Math.random() * ((doc_height - 100) / 2) + 1;
	sn[i] = Math.sin(a[i]);
	cs[i] = Math.cos(a[i]);
	x[i] = r[i] * sn[i] + cx;
	y[i] = r[i] * cs[i] + cy;
}
function makeStar() {
	a[i] = Math.random() * 360;
	r[i] = Math.random() * 4 + 1;
	sn[i] = Math.sin(a[i]);
	cs[i] = Math.cos(a[i]);
	x[i] = r[i] * sn[i] + cx;
	y[i] = r[i] * cs[i] + cy;
}
function updateStar() {
	r[i] += s;
	x[i] = r[i] * sn[i] + cx;
	y[i] = r[i] * cs[i] + cy;
}
function snowNS() {
	for (i = 0; i < no; ++ i) {
		updateStar();
		if ((x[i] <= 50) || (x[i] >= (doc_width - 50)) || (y[i] <= 50) || (y[i] >= (doc_height - 50))) {
			makeStar();
			doc_width = self.innerWidth;
			doc_height = self.innerHeight;
		}
		document.layers["dot"+i].top = y[i];
		document.layers["dot"+i].left = x[i];

}
	setTimeout("snowNS()", speed);
}
function snowIE() {
	for (i = 0; i < no; ++ i) {
		updateStar();
		if ((x[i] <= 50) || (x[i] >= (doc_width - 50)) || (y[i] <= 50) || (y[i] >= (doc_height - 50))) {
			makeStar();
			doc_width = document.body.clientWidth;
			doc_height = document.body.clientHeight;
		}
		document.all["dot"+i].style.pixelTop = y[i];
		document.all["dot"+i].style.pixelLeft = x[i];

}
	setTimeout("snowIE()", speed);
}
if (ns4up) {
	snowNS();
}
else if (ie4up) {
	snowIE();
}
// End -->
</SCRIPT>