代码如下： <style> .drop { position: absolute; width: 3; filter: flipV(), flipH(); font-size: 40; color: blue } </style> <script language="javascript"> snow = false; // false-雨; true-雪 snowsym = " * " //这是符号 rainsym = " ' " //这儿可以放图片. howmany = 10 //雨滴多少/雪片? if(snow){sym = snowsym; speed=1; angle=10; drops=howmany} else{sym = rainsym; speed=50; drops=howmany; angle=6} movex = -speed/angle; movey = speed; count = 0; function moverain(){ for(move = 0; move < drops; move++){ xx[move]+=movex; yy[move]+=mv[move]; hmm = Math.round(Math.random()*1); if(xx[move] < 0){xx[move] = maxx+10;} if(yy[move] > maxy){yy[move] = 10;} drop[move].left = xx[move] drop[move].top = yy[move]+document.body.scrollTop; }setTimeout('moverain()','1')} </script> </head> <body bgcolor=#000000> <script language="javascript"> if (document.all){ drop = new Array(); xx = new Array(); yy = new Array(); mv = new Array() ly = "document.all[\'"; st = "\'].style" for(make = 0; make < drops; make++){ document.write('<div id="drop'+make+'" class=drop>'+sym+'</div>'); drop[make] = eval(ly+'drop'+make+st); maxx = document.body.clientWidth-40 maxy = document.body.clientHeight-40 xx[make] = Math.random()*maxx; yy[make] = -100-Math.random()*maxy; drop[make].left = xx[make] drop[make].top = yy[make] mv[make] = (Math.random()*5)+speed/4; drop[make].fontSize = (Math.random()*10)+20; if(snow){col = 'white'}else{col = 'blue'} drop[make].color = col; } window.onload=moverain } </script>
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