仿雪花
else{document.write("<layer name=\"dot"+i+"\" left=\"15\" ");document.write("top=\"15\" visibility=\"show\"><img src=\"");document.write(xuehuaflake+"\" 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(xuehuaflake+"\" 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(xuehuaflake+"\" border=\"0\"></div>");}}}
function xuehuaNS(){for(i=0;i<no;++i){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("xuehuaNS()",speed);}
function xuehuaIE(){for(i=0;i<no;++i){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("xuehuaIE()",speed);}if(ns4up){xuehuaNS();}else if(ie4up){xuehuaIE();}
//-->
</script>

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