Tiện ích tuyết rơi cho Blogspot

Design (Thiết kế) -> Page Elements (Chỉnh sữa trang) -> Add a Gadget (Thêm tiện ích) -> Chọn thêm tiện ích HTML/Javascript và dán đoạn mã sau vào:

<!-- Hi&#7879;u &#7913;ng tuy&#7871;t r&#417;i cho blog -->
<script type='text/javascript'>
//<![CDATA[
var snowmax = 30; // S&#7889; l&#432;&#7907;ng tuy&#7871;t
var snowcolor = new Array("#aaaacc", "#ddddFF", "#ccccDD");
var snowtype = new Array("Arial Black", "Arial Narrow", "Times", "Comic Sans MS");
var snowletter = "*"; //Hình tuy&#7871;t, có th&#7875; thay thành d&#7845;u ch&#7845;m “.” hay các kí t&#7921; khác
var sinkspeed = 0.9; // T&#7889;c &#273;&#7897; tuy&#7871;t r&#417;i
var snowmaxsize = 30; // Size h&#7841;t tuy&#7871;t to nh&#7845;t
var snowminsize = 10; // Size h&#7841;t tuy&#7871;t nh&#7887; nh&#7845;t
var snowingzone = 1;

var snow = new Array();
var marginbottom;
var marginright;
var ScrollTop;
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(a)
{
rand = Math.floor(a * Math.random());
return rand
}

function iecompattest()
{
return (document.compatMode && document.compatMode != "BackCompat") ? document.documentElement : document.body
}

function InitHeight() {
if (ie5 || opera) {
marginbottom = iecompattest().clientHeight + 5; //clientHeight;
marginright = iecompattest().scrollWidth + 5; //clientWidth
}
else {
if (ns6) {
marginbottom = self.innerHeight;
marginright = self.innerWidth
}
}
ScrollTop = document.body.scrollTop;
if (ScrollTop == 0) {
if (window.pageYOffset)
ScrollTop = window.pageYOffset;
else
ScrollTop = (document.body.parentElement) ? document.body.parentElement.scrollTop : 0;
}
marginbottom += ScrollTop;
}

function initsnow()
{
InitHeight()
var a = 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(a) + snowminsize;
snow[i].style.fontSize = snow[i].size + "px";
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 + "px";
snow[i].style.top = snow[i].posy + "px"
}
movesnow()
}

function movesnow()
{
InitHeight();
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]) + "px";
snow[i].style.top = snow[i].posy + "px";
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 = ScrollTop
}
}
var a = setTimeout("movesnow()", 60)
}
function hidesnow()
{
if (window.timer) { clearTimeout(timer) }
for (i = 0;i <= snowmax;i++)
{
document.getElementById("s" + i).style.visibility = "hidden"
}
}


for (i = 0;i <= snowmax;i++)
{
document.write('<div id="s' + i + '" style="POSITION: absolute; Z-INDEX: 9' + i + "; VISIBILITY: visible; TOP:-" + snowmaxsize + 'px; LEFT: 15px;">' + snowletter + "</div>")
}
if (browserok)
{ initsnow() }
else
{ document.write('Votre navigateur ne supporte pas ce Javascript, ') };
//]]>
</script>

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