雪花飘落js特效代码(html雪花飘落效果代码)
雪花飘落的JS代码
N是管雪花的数量，Y是雪花下落的速度，(document.layers)?window.innerHeight:window.document.body.clientHeight;是雪花下落的尺寸，可以改为=(document.layers)?window.innerHeight+100:window.document.body.clientHeight;+100，下落尺寸加大100。
求网页制作雪花飘落效果的代码
下面是雪花飘落的js代码
拷进去就好了，或者调用！！！！
script language="JavaScript"
!--
N =20;
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+7);
}
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]+"';z-index: 1font color=white size=3 face='Wingdings'T/font/LAYER")}
}
else{
document.write('div style="position:absolute;top:0px;left:0px;z-index: 1"');
document.write('div style="position:relative;z-index: 1"');
for (i = 0; i N; i++)
{document.write('div id="si" style="position:absolute;z-index: 1;top:0;left:0;width:'+M[i]+';height:'+M[i]+';font-size:'+M[i]+'"font color=white size=3 face="Wingdings"T/font/div')}
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];
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+7);
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()',40);
}
snow()
//--
/script
利用JS给网页添加雪花飘落的效果
1、修改部分如下：
?head
??script?src="?Demo/jsized.snow.min.js"?type="text/javascript"/script????????
script
????/**
?????*?This?function?takes?2?arguments
?????*?First?is?the?path?to?the?directory?with?snowflake?images
?????*?Second?is?the?maximum?number?of?snowflakes,?please?do?not
?????*?set?this?number?above?60?as?it?will?impact?the?performance
?????*/
????createSnow("",?60);//目录改为当前目录
/script
?/head
?body
??测试
?/body
/html
2、在该网页目录?下?新添加?四张雪花图片?命名规则（snow0.gif?snow1.gif?snow2.gif?snow3.gif）