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漫天飞雪

    纷纷扬扬的雪花从天空飘落(注意路径问题,否则图片snow.gif将无法显示)

　　看到雪花了吗?

　　<SCRIPT LANGUAGE="JavaScript1.2"> <!-- var no = 12; var speed = 10; var heart = "http://www.baifan.net/bf/wytx/snow.gif"; var flag; 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 = 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(); amx = new Array(); amy = new Array(); stx = new Array(); sty = new Array(); flag = new Array(); for (i = 0; i < no; ++ i) { dx[i] = 0; // set coordinate variables xp[i] = Math.random()*(doc_width-30)+10; yp[i] = Math.random()*doc_height; amy[i] = 12+ Math.random()*20; amx[i] = 10+ Math.random()*40; stx[i] = 0.02 + Math.random()/10; sty[i] = 0.7 + Math.random(); flag[i] = (Math.random()>0.5)?1:0; 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(heart+ "\" border=\"0\"></layer>"); } else { document.write("<layer name=\"dot"+ i +"\" left=\"15\" "); document.write("top=\"15\" visibility=\"show\"><img src=\""); document.write(heart+ "\" 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(heart+ "\" 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(heart+ "\" border=\"0\"></div>"); } } } function baifan_net() { for (i = 0; i < no; ++ i) { if (yp[i] > doc_height-50) { xp[i] = 10+ Math.random()*(doc_width-amx[i]-30); yp[i] = 0; flag[i]=(Math.random()<0.5)?1:0; stx[i] = 0.02 + Math.random()/10; sty[i] = 0.7 + Math.random(); doc_width = self.innerWidth; doc_height = self.innerHeight; } if (flag[i]) dx[i] += stx[i]; else dx[i] -= stx[i]; if (Math.abs(dx[i]) > Math.PI) { yp[i]+=Math.abs(amy[i]*dx[i]); xp[i]+=amx[i]*dx[i]; dx[i]=0; flag[i]=!flag[i]; } document.layers["dot"+i].top = yp[i] + amy[i]*(Math.abs(Math.sin(dx[i])+dx[i])); document.layers["dot"+i].left = xp[i] + amx[i]*dx[i]; } setTimeout("baifan_net()", speed); } function www_baifan_net() { for (i = 0; i < no; ++ i) { if (yp[i] > doc_height-50) { xp[i] = 10+ Math.random()*(doc_width-amx[i]-30); yp[i] = 0; stx[i] = 0.02 + Math.random()/10; sty[i] = 0.7 + Math.random(); flag[i]=(Math.random()<0.5)?1:0; doc_width = document.body.clientWidth; doc_height = document.body.clientHeight; } if (flag[i]) dx[i] += stx[i]; else dx[i] -= stx[i]; if (Math.abs(dx[i]) > Math.PI) { yp[i]+=Math.abs(amy[i]*dx[i]); xp[i]+=amx[i]*dx[i]; dx[i]=0; flag[i]=!flag[i]; } document.all["dot"+i].style.pixelTop = yp[i] + amy[i]*(Math.abs(Math.sin(dx[i])+dx[i])); document.all["dot"+i].style.pixelLeft = xp[i] + amx[i]*dx[i]; } setTimeout("www_baifan_net()", speed); } if (ns4up) { baifan_net(); } else if (ie4up) { www_baifan_net(); } //--> </script>