Javascript设计漫天雪花
时间:2007-12-27 来源:不详 作者:林子
<!--
N = 40;
Y = new Array();
X = new Array();
S = new Array();
A = new Array();
B = new Array();
M = new Array();
V = (document.layers)?1:0; iH=(document.layers)?window.innerHeight:window.document.body.clientHeight;
iW=(document.layers)?window.innerWidth:window.document.body.clientWidth;
for (i=0; i < N; i ){
Y[i]=Math.round(Math.random()*iH);
X[i]=Math.round(Math.random()*iW);
S[i]=Math.round(Math.random()*5 2);
A[i]=0;
B[i]=Math.random()*0.1 0.1;
M[i]=Math.round(Math.random()*1 1);
}
if (V){
for (i = 0; i < N; i )
{document.write("<LAYER NAME='sn" i "' LEFT=0 TOP=0 BGCOLOR='#FFFFF0' CLIP='0,0," M[i] "," M[i] "'></LAYER>")}
}
else{
document.write('<div style="position:absolute;top:0px;left:0px">');
document.write('<div style="position:relative">');
for (i = 0; i < N; i )
{document.write('<div id="si" style="position:absolute;top:0;left:0;width:' M[i] ';height:' M[i] ';background:#fffff0;font-size:' M[i] '"></div>')}
织梦好，好织梦
document.write('</div></div>');
}
function snow(){
var H=(document.layers)?window.innerHeight:window.document.body.clientHeight;
var W=(document.layers)?window.innerWidth:window.document.body.clientWidth;
var T=(document.layers)?window.pageYOffset:document.body.scrollTop;
var L=(document.layers)?window.pageXOffset:document.body.scrollLeft;
for (i=0; i < N; i ){
sy=S[i]*Math.sin(90*Math.PI/180);
sx=S[i]*Math.cos(A[i]);
Y[i] =sy;
X[i] =sx;
if (Y[i] > H){
Y[i]=-10;
X[i]=Math.round(Math.random()*W);
M[i]=Math.round(Math.random()*1 1);
S[i]=Math.round(Math.random()*5 2);
}
if (V){document.layers['sn' i].left=X[i];document.layers['sn' i].top=Y[i] T}
else{si[i].style.pixelLeft=X[i];si[i].style.pixelTop=Y[i] T}
A[i] =B[i];
}
setTimeout('snow()',10);
}
file://-->
</script>
把<body>中的内容改为：
<body bgcolor=#ffffff onLoad="snow()">
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