//neige sur l'ecran	
			var no = 15; // nombre de flocons
			var speed = 5; // plus le nombre est petit, plus la vitesse augmente
			var snowflake = "snow.gif"; // image
			//////////////////////////////////////////////////////////////////////////////
			var ns4up = (document.layers) ? 1 : 0;  // browser sniffer
			var ie4up = (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 = 600;
			if (ns4up) {
			doc_width = self.innerWidth;
			doc_height = self.innerHeight;
			} else if (ie4up) {
			doc_width = document.body.clientWidth;
			doc_height = document.body.clientHeight;
			}
			dx = new Array();
			xp = new Array();
			yp = new Array();
			am = new Array();
			stx = new Array();
			sty = new Array();
			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\" ");
			document.write("top=\"15\" visibility=\"show\"><img src=\"");
			document.write(snowflake + "\" border=\"0\"></layer>");
			} else {
			document.write("<layer name=\"dot"+ i +"\" left=\"15\" ");
			document.write("top=\"15\" visibility=\"show\"><img src=\"");
			document.write(snowflake + "\" border=\"0\"></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;\"><img src=\"");
			document.write(snowflake + "\" border=\"0\"></div>");
			} else {
			document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
			document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
			
			document.write("visible; TOP: 15px; LEFT: 15px;\"><img src=\"");
			document.write(snowflake + "\" border=\"0\"></div>");
				  }
			   }
			}
			function snowNS() {  // Netscape main animation function
			for (i = 0; i < no; ++ i) {  // iterate for every dot
			yp[i] += sty[i];
			if (yp[i] > doc_height-50) {
			xp[i] = Math.random()*(doc_width-am[i]-30);
			yp[i] = 0;
			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];
			document.layers["dot"+i].left = xp[i] + am[i]*Math.sin(dx[i]);
			}
			setTimeout("snowNS()", speed);
			}
			function snowIE() {  // IE main animation function
			for (i = 0; i < no; ++ i) {  // iterate for every dot
			yp[i] += sty[i];
			if (yp[i] > doc_height-50) {
			xp[i] = Math.random()*(doc_width-am[i]-30);
			yp[i] = 0;
			stx[i] = 0.02 + Math.random()/10;
			sty[i] = 0.7 + Math.random();
			doc_width = document.body.clientWidth;
			doc_height = document.body.clientHeight;
			}
			dx[i] += stx[i];
			document.all["dot"+i].style.pixelTop = yp[i];
			document.all["dot"+i].style.pixelLeft = xp[i] + am[i]*Math.sin(dx[i]);
			}
			setTimeout("snowIE()", speed);
			}
			if (ns4up) {
			snowNS();
			} else if (ie4up) {
			snowIE();
			}