ÿþ// SÑ l°
ãng bông Tuy¿t

var snowmax=60



// ChÍn màu cho bông Tuy¿t

var snowcolor=new Array("#AAAACC","#DDDDFF","#CCCCDD","#F3F3F3","#F0FFFF")



// ChÍn Font chï cho Bông tuy¿t

var snowtype=new Array("Arial Black","Arial Narrow","Times","Comic Sans MS")



// KiÃu bông tuy¿t (VD: "*")

var snowletter="*"



// TÑc 
Ù (recommended values range from 0.3 to 2)

var sinkspeed=0.6



// kích th°
Ûc lÛn nh¥t cho bông tuy¿t

var snowmaxsize=25



// kích th°
Ûc nhÏ nh¥t cho bông tuy¿t

var snowminsize=12





// Set 1 for all-over-snowing, set 2 for left-side-snowing

// Set 3 for center-snowing, set 4 for right-side-snowing

var snowingzone=1



  /*

   //   * NO CONFIGURATION BELOW HERE *

*/



// ph§n d°
Ûi 
ây tÑt nh¥t là ko nên chÉnh sía

var snow=new Array()

var marginbottom

var marginright

var timer

var i_snow=0

var x_mv=new Array();

var crds=new Array();

var lftrght=new Array();

var browserinfos=navigator.userAgent

var ie5=document.all&&document.getElementById&&!browserinfos.match(/Opera/)

var ns6=document.getElementById&&!document.all

var opera=browserinfos.match(/Opera/)  

var browserok=ie5||ns6||opera



function randommaker(range) {        

    rand=Math.floor(range*Math.random())

    return rand

}



function initsnow() {

    if (ie5 || opera) {

        marginbottom = document.body.clientHeight

        marginright = document.body.clientWidth

    }

    else if (ns6) {

        marginbottom = window.innerHeight

        marginright = window.innerWidth

    }

    var snowsizerange=snowmaxsize-snowminsize

    for (i=0;i<=snowmax;i++) {

        crds[i] = 0;                      

        lftrght[i] = Math.random()*15;        

        x_mv[i] = 0.03 + Math.random()/10;

        snow[i]=document.getElementById("s"+i)

        snow[i].style.fontFamily=snowtype[randommaker(snowtype.length)]

        snow[i].size=randommaker(snowsizerange)+snowminsize

        snow[i].style.fontSize=snow[i].size

        snow[i].style.color=snowcolor[randommaker(snowcolor.length)]

        snow[i].sink=sinkspeed*snow[i].size/5

        if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)}

        if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)}

        if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4}

        if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2}

        snow[i].posy=randommaker(2*marginbottom-marginbottom-2*snow[i].size)

        snow[i].style.left=snow[i].posx

        snow[i].style.top=snow[i].posy

    }

    movesnow()

}



function movesnow() {

    for (i=0;i<=snowmax;i++) {

        crds[i] += x_mv[i];

        snow[i].posy+=snow[i].sink

        snow[i].style.left=snow[i].posx+lftrght[i]*Math.sin(crds[i]);

        snow[i].style.top=snow[i].posy

        

        if (snow[i].posy>=marginbottom-2*snow[i].size || parseInt(snow[i].style.left)>(marginright-3*lftrght[i])){

            if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)}

            if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)}

            if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4}

            if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2}

            snow[i].posy=0

        }

    }

    var timer=setTimeout("movesnow()",50)

}



for (i=0;i<=snowmax;i++) {

    document.write("<span id='s"+i+"' style='position:absolute;top:-"+snowmaxsize+"'>"+snowletter+"</span>")

}

if (browserok) {

    window.onload=initsnow

}