Source code "lá thu rơi"

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Source code "lá thu rơi" diễn đàn A3k43

Code:

<script language=Javascript>
<!-- fall script Kurt Grigg - http://www.btinternet.com/~kurt.grigg/javascript

var isNetscape6=false;
if (navigator.appName == "Netscape" && parseFloat(navigator.appVersion) >= 5)
isNetscape6=true;

/*
This script has been disabled for
Netscape 6 due to ugly scrollbar
activety. Could probably be fixed
with a clipped container div but
can't be bothered.
*/

if (!isNetscape6){
num=7; //Smoothness depends on image file size, the smaller the size the more you can use!
stopafter=99999999; //seconds!


//Pre-load images!
pics=new Array("http://i277.photobucket.com/albums/kk52/eduviet/al.gif");
load=new Array();
for(i=0; i < pics.length; i++){
 load[i]=new Image();
 load[i].src=pics[i];
}
stopafter*=1000;
timer=null;
y=new Array();
x=new Array();
s=new Array();
s1=new Array();
s2=new Array();
if (document.layers){
 for (i=0; i < num; i++){
 randomleaf = pics[Math.floor(Math.random()*pics.length)];
 document.write("<LAYER NAME='leaf"+i+"' LEFT=0 TOP=0><img src="+randomleaf+"></LAYER>");
 }
}
if (document.all){
document.write('<div style="position:absolute;top:0px;left:0px"><div style="position:relative">');
 for (i=0; i < num; i++){
 randomleaf = pics[Math.floor(Math.random()*pics.length)];
 document.write('<img id="leaf'+i+'" src="'+randomleaf+'" style="position:absolute;top:0px;left:0px">');
 }
 document.write('</div></div>');
}
if (!document.all&&!document.layers){
 for (i=0; i < num; i++){
 randomleaf = pics[Math.floor(Math.random()*pics.length)];
 document.write("<div id='leaf"+i+"' style='position:absolute;top:0px;left:0px'><img src="+randomleaf+"></div>");
 }
}
inih=(document.all)?window.document.body.clientHeight:window.innerHeight-100;
iniw=(document.all)?window.document.body.clientWidth:window.innerWidth-100;
for (i=0; i < num; i++){                                                               
 y[i]=Math.round(Math.random()*inih);
 x[i]=Math.round(Math.random()*iniw);
 s[i]=Math.random()*5+3;
 s1[i]=0;
 s2[i]=Math.random()*0.1+0.05;
}
function fall(){
h=(document.all)?window.document.body.clientHeight:window.innerHeight;
w=(document.all)?window.document.body.clientWidth:window.innerWidth;
scy=(document.all)?document.body.scrollTop:window.pageYOffset;
scx=(document.all)?document.body.scrollLeft:window.pageXOffset;
for (i=0; i < num; i++){
sy=s[i]*Math.sin(90*Math.PI/180);
sx=s[i]*Math.cos(s1[i]);
y[i]+=sy;
x[i]+=sx;
if (y[i] > h){
 y[i]=-60;
 x[i]=Math.round(Math.random()*w);
 s[i]=Math.random()*5+3;
}
s1[i]+=s2[i];
if (document.layers){
 document.layers["leaf"+i].left=x[i];
 document.layers["leaf"+i].top=y[i]+scy;
}
else{
 document.getElementById("leaf"+i).style.left=x[i];
 document.getElementById("leaf"+i).style.top=y[i]+scy;
}
}
timer=setTimeout('fall()',20);
}
fall();

function dsbl(){
for (i=0; i < num; i++){
 if (document.layers)
 document.layers["leaf"+i].visibility="hide";
 else
 document.getElementById("leaf"+i).style.visibility="hidden";
}
clearTimeout(timer);
}
setTimeout('dsbl()',stopafter);
}
//-->
</script>

[dactuan_90Amateur]

tôi ko hiểu j` hết
ông là cao thủ rùi

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đây là vấn đề căn bản của công việc thiết kế website , chú còn học nhiều, he he....

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