javascript的下雨效果,比flash的下雨效果还好_电脑软硬件应用网

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<html>

<head>

<style>

.drop { position: absolute; width: 3;  filter: flipV(), flipH();

font-size: 40; color: blue }

</style>

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?

/**************不要给变下面的参数***********/

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>

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>

</body>

</html>

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