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<script language="JavaScript"> var no = 80; // number of snowflakes var speed = 20; // the smaler, the faster snowflakes var snowflake = "EUER SCHNEE.gif"; // picture source var ns4b = (document.layers) ? 1 : 0; // Netscape4.x var b4up = (document.all) ? 1 : 0; // MSIE, Opera, Netscape5 var dx, xp, yp; // coordinate and position variables var am, stx, sty; // amplitude and step variables var snowobj; var i, doc_width = 1024, doc_height = 1280; if (ns4b) { doc_width = self.innerWidth; doc_height = self.innerHeight; } else if (b4up) { doc_width = document.body.clientWidth; doc_height = document.body.clientHeight; } else { b4up = 1; // 800x600 screen-default } dx = new Array(); xp = new Array(); yp = new Array(); am = new Array(); stx = new Array(); sty = new Array(); snowobj = new Array(); for (i=0; i<no; ++i) { // iterate for every snowflake 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 (ns4b) { // set layers document.write("<LAYER NAME=\"flake"+ i +"\" LEFT=\"15\" " + "TOP=\"15\" VISIBILITY=\"show\"><IMG SRC=\"" + snowflake +"\" BORDER=0></LAYER>"); } else if (b4up) { document.write("<DIV ID=\"flake"+ i +"\" STYLE=\"" + "position:absolute; z-index:"+ i +"; visibility:visible; " + "top:15px; left:15px;\"><IMG SRC=\""+ snowflake + "\" BORDER=0></DIV>"); snowobj[i] = eval (document.getElementById("flake"+i).style); } } function snowNS() { // Netscape4 main animation function for (i=0; i<no; ++i) { // iterate for every snowflake 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(); } dx[i] += stx[i]; document.layers["flake"+i].top = yp[i]; document.layers["flake"+i].left = xp[i] + am[i]*Math.sin(dx[i]); } setTimeout("snowNS()", speed); } function snowDocument() { // MSIE4, Opera5, Netscape5 main for (i=0; i<no; ++i) { // iterate for every flake 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(); } dx[i] += stx[i]; snowobj[i].top = yp[i]; snowobj[i].left = xp[i] + am[i]*Math.sin(dx[i]); } setTimeout("snowDocument()", speed); }//snowDocument if (ns4b) { // Netscape4 snowNS(); } else if (b4up) { // MSIE4, Opera5, Netscape5 snowDocument(); } </script> |
