花草上升效果

注释：放在<body>与</body>之间

<script language="JavaScript1.2"> <!-- wenchin var no = 20; var speed = 1; var snow = new Array(); snow[0] = "f1.gif" snow[1] = "f2.gif" snow[2] = "f3.gif" var ns4up = (document.layers) ? 1 : 0; var ie4up = (document.all) ? 1 : 0; var dx, xp, yp; var am, stx, sty; var i, doc_width = 800, doc_height = 1800; 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(); j = 0; for (i = 0; i < no; ++ i) { dx[i] = 0; xp[i] = Math.random()*(doc_width-50); yp[i] = Math.random()*doc_height; am[i] = Math.random()*20; stx[i] = 0.02 + Math.random()/10; sty[i] = 0.7 + Math.random(); if (ns4up) { 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) { if (i == 0) { document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"VISIBILITY: visible; TOP: 15px; LEFT: 15px; width:1;\"><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;\"><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]; document.layers["dot"+i].left = xp[i] + am[i]*Math.sin(dx[i]); } setTimeout("snowNS()", speed); } function snowIE() { for (i = 0; i < no; ++ i) { 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 = 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(); } // wenchin--> </script>