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<script language="JavaScript1.2"> var snowsrc="http://sh.netsh.com/sample/fly01.gif" ; var no = 10; 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(); am = new Array(); stx = new Array(); sty = new Array(); for (i = 0; i < no; ++ i) { dx = 0; xp = Math.random()*(doc_width-50); yp = Math.random()*doc_height; am = Math.random()*20; stx = 0.02 + Math.random()/10; sty = 0.7 + Math.random(); if (ns4up) { document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src="+snowsrc+" border=\"0\" name=\"snow2\"></layer>"); } else if (ie4up) { document.write("<div id=\"dot"+ i +"\" style=\" OSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src="+snowsrc+" border=\"0\" name=\"snow4\"></div>"); } } function snowNS() { for (i = 0; i < no; ++ i) { yp += sty; if (yp > doc_height-50) { xp = Math.random()*(doc_width-am-30); yp = 0; stx = 0.02 + Math.random()/10; sty = 0.7 + Math.random(); doc_width = self.innerWidth; doc_height = self.innerHeight; } dx += stx; document.layers["dot"+i].top = yp; document.layers["dot"+i].left = xp + am*Math.sin(dx); } setTimeout("snowNS()", 10); } function snowIE() { for (i = 0; i <no; ++ i) { yp += sty; if (yp > doc_height-50) { xp = Math.random()*(doc_width-am-30); yp = 0; stx = 0.02 + Math.random()/10; sty = 0.7 + Math.random(); doc_width = document.body.clientWidth; doc_height = document.body.clientHeight; } dx += stx; document.all["dot"+i].style.pixelTop = yp; document.all["dot"+i].style.pixelLeft = xp + am*Math.sin(dx); } setTimeout("snowIE()", 10); } if (ns4up) { snowNS(); } else if (ie4up) { snowIE(); }</script>
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发表于 2008-1-13 03:16:38
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