//Bubble Script by Lisa (issa@lissaexplains.com, http://lissaexplains.com)
//Based on code by Altan d.o.o. (snow@altan.hr)
//For full source code and installation instructions to this script, visit http://www.dynamicdrive.com

var no = 15; // image number or falling rate
var speed = 2; // the lower the number the faster the image moves
var snow = new Array();
snow[0] = "floaters/bubble.gif"
snow[1] = "floaters/bubble.gif"
snow[2] = "floaters/bubble.gif"

var ns4up = (document.layers) ? 1 : 0;  // browser sniffer
var ie4up = (document.all) ? 1 : 0;
var ns6up = (document.getElementById&&!document.all) ? 1 : 0;
var dx, xp, yp;    // coordinate and position variables
var am, stx, sty;  // amplitude and step variables
var i, doc_width = 800, doc_height = 1800;
docSize();

dx = new Array();
xp = new Array();
yp = new Array();
am = new Array();
stx = new Array();
sty = new Array();
j = 0;

for (i = 0; i < no; ++ i) {
	dx[i] = 0;                        // set coordinate variables
	xp[i] = Math.random()*(doc_width-50);  // set position variables
	yp[i] = Math.random()*doc_height;
	am[i] = Math.random()*20;         // set amplitude variables
	stx[i] = 0.02 + Math.random()/10; // set step variables
	sty[i] = 0.7 + Math.random();     // set step variables
	if (ns4up) {                      // set layers
			if (i == 0) {
					document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src=\""+ snow[j] + "\" border=\"0\"></layer>");
			} else {
					document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src=\""+ snow[j] + "\" border=\"0\"></layer>");
			}
	} else if (ie4up||ns6up) {
		if (i == 0) 
		{
				document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"VISIBILITY: visible; TOP: 15px; LEFT: 15px; width:1; z-index:100;\"><img src=\"" + snow[j] + "\" border=\"0\"></div>");
		} else {
				document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"VISIBILITY: visible; TOP: 15px; LEFT: 15px; width:1; z-index:100;\"><img src=\"" + snow[j] + "\" border=\"0\"></div>");
		}
	}
	if (j == (snow.length-1)) { j = 0; } else { j += 1; }
}

function snowNS() {  // Netscape main animation function
	for (i = 0; i < no; ++ i) {  // iterate for every dot
		yp[i] -= sty[i];
		if (yp[i] < -50) {
			xp[i] = Math.random()*(doc_width-am[i]-30);
			yp[i] = doc_height;
			stx[i] = 0.02 + Math.random()/10;
			sty[i] = 0.7 + Math.random();
			doc_width = self.innerWidth;
			doc_height = self.innerHeight;
		}
		dx[i] += stx[i];
		document.layers["dot"+i].top = yp[i]+pageYOffset;
		document.layers["dot"+i].left = xp[i] + 
		am[i]*Math.sin(dx[i]);
	}
	setTimeout("snowNS()", speed);
}

function snowIE_NS6() {  // IE main animation function
	for (i = 0; i < no; ++ i) {  // iterate for every dot
		yp[i] -= sty[i];
		if (yp[i] < -50) {
			xp[i] = Math.random()*(doc_width-am[i]-30);
			yp[i] = doc_height;
			stx[i] = 0.02 + Math.random()/10;
			sty[i] = 0.7 + Math.random();
			docSize();
			//doc_width = ns6up?window.innerWidth-5:document.body.clientWidth;
			//doc_height = ns6up?window.innerHeight-5:document.body.clientHeight;
		}
		dx[i] += stx[i];
		if (ie4up){
			document.all["dot"+i].style.pixelTop = yp[i]+document.body.scrollTop;
			document.all["dot"+i].style.pixelLeft = xp[i] + am[i]*Math.sin(dx[i]);
		} else if (ns6up){
			document.getElementById("dot"+i).style.top=yp[i]+pageYOffset;
			document.getElementById("dot"+i).style.left=xp[i] + am[i]*Math.sin(dx[i]);
		}
	}
	setTimeout("snowIE_NS6()", speed);
}

function docSize() {
	if (ns4up||ns6up) {
			doc_width = self.innerWidth;
			doc_height = self.innerHeight;
	} else if (ie4up) {
			//doc_width = document.body.clientWidth;
			//doc_height = document.body.clientHeight;			
			if (document.documentElement && document.documentElement.clientWidth) {
				doc_width = document.documentElement.clientWidth;
			} else if ( document.body) {
				doc_width = document.body.clientWidth;
			};
			if (document.documentElement && document.documentElement.clientHeight) {
				doc_width = document.documentElement.clientHeight;
			} else if ( document.body && document.body.clientHeight) {
				doc_height = document.body.clientHeight;
			};
	}
}

if (ns4up) {
        snowNS();
} else if (ie4up||ns6up) {
        snowIE_NS6();
}