JavaScript Effect: Chữ Merry Chistmas chạy vòng vòng quay con trỏ chuột.

Một mẫu hiệu ứng đẹp chữ động chạy vòng vòng quay con trỏ chuột trông rất vui, thỉnh thoảng dùng để thay đổi không phí cho website cũng rất tuyệt, nhưng thỉnh thoảng thôi, để lâu nhìn rối con mắt :))

Hỗ trợ trình duyệt: Firefox, IE, Chrome, Safari, Opera



JavaScript Effect Source:

/* Circle Text Styles */
#outerCircleText {
/* Optional - DO NOT SET FONT-SIZE HERE, SET IT IN THE SCRIPT */
font-style: Times New Roman;
font-weight: bold;
font-family: 'comic sans ms', verdana, times new roman;
color: RED;
/* End Optional */
/* Start Required - Do Not Edit */
position: absolute;top: 0;left: 0;z-index: 3000;cursor: default;}
#outerCircleText div {position: relative;}
#outerCircleText div div {position: absolute;top: 0;left: 0;text-align: center;}
/* End Required */
/* End Circle Text Styles */
<style type="text/css">
/* Circle Text Styles */
#outerCircleText {
/* Optional - DO NOT SET FONT-SIZE HERE, SET IT IN THE SCRIPT */
font-style: Times New Roman;
font-weight: bold;
font-family: 'comic sans ms', verdana, times new roman;
color: RED;
/* End Optional */
/* Start Required - Do Not Edit */
position: absolute;top: 0;left: 0;z-index: 3000;cursor: default;}
#outerCircleText div {position: relative;}
#outerCircleText div div {position: absolute;top: 0;left: 0;text-align: center;}
/* End Required */
/* End Circle Text Styles */</style>
<p>
  (Diễn Đàn Star Night)<script type="text/javascript">
/* Circling text trail- Tim Tilton
  Website: http://www.tempermedia.com/
  Visit: http://www.dynamicdrive.com/ for Original Source and tons of scripts
  Modified Here for more flexibility and modern browser support
  Modifications as first seen in http://www.dynamicdrive.com/forums/
  username:jscheuer1 - This notice must remain for legal use
  */
;(function(){
// Your message here (QUOTED STRING)
var msg = " Merry Christmas  ";
/* THE REST OF THE EDITABLE VALUES BELOW ARE ALL UNQUOTED NUMBERS */
// Set font's style size for calculating dimensions
// Set to number of desired pixels font size (decimal and negative numbers not allowed)
var size = 20;
// Set both to 1 for plain circle, set one of them to 2 for oval
// Other numbers & decimals can have interesting effects, keep these low (0 to 3)
var circleY = 0.75; var circleX = 2;
// The larger this divisor, the smaller the spaces between letters
// (decimals allowed, not negative numbers)
var letter_spacing = 5;
// The larger this multiplier, the bigger the circle/oval
// (decimals allowed, not negative numbers, some rounding is applied)
var diameter = 10;
// Rotation speed, set it negative if you want it to spin clockwise (decimals allowed)
var rotation = 0.4;
// This is not the rotation speed, its the reaction speed, keep low!
// Set this to 1 or a decimal less than one (decimals allowed, not negative numbers)
var speed = 0.3;
////////////////////// Stop Editing //////////////////////
if (!window.addEventListener && !window.attachEvent || !document.createElement) return;
msg = msg.split('');
var n = msg.length - 1, a = Math.round(size * diameter * 0.208333), currStep = 20,
ymouse = a * circleY + 20, xmouse = a * circleX + 20, y = [], x = [], Y = [], X = [],
o = document.createElement('div'), oi = document.createElement('div'),
b = document.compatMode && document.compatMode != "BackCompat"? document.documentElement : document.body,
mouse = function(e){
 e = e || window.event;
 ymouse = !isNaN(e.pageY)? e.pageY : e.clientY; // y-position
 xmouse = !isNaN(e.pageX)? e.pageX : e.clientX; // x-position
},
makecircle = function(){ // rotation/positioning
 if(init.nopy){
  o.style.top = (b || document.body).scrollTop + 'px';
  o.style.left = (b || document.body).scrollLeft + 'px';
 };
 currStep -= rotation;
 for (var d, i = n; i > -1; --i){ // makes the circle
  d = document.getElementById('iemsg' + i).style;
  d.top = Math.round(y[i] + a * Math.sin((currStep + i) / letter_spacing) * circleY - 15) + 'px';
  d.left = Math.round(x[i] + a * Math.cos((currStep + i) / letter_spacing) * circleX) + 'px';
 };
},
drag = function(){ // makes the resistance
 y[0] = Y[0] += (ymouse - Y[0]) * speed;
 x[0] = X[0] += (xmouse - 20 - X[0]) * speed;
 for (var i = n; i > 0; --i){
  y[i] = Y[i] += (y[i-1] - Y[i]) * speed;
  x[i] = X[i] += (x[i-1] - X[i]) * speed;
 };
 makecircle();
},
init = function(){ // appends message divs, & sets initial values for positioning arrays
 if(!isNaN(window.pageYOffset)){
  ymouse += window.pageYOffset;
  xmouse += window.pageXOffset;
 } else init.nopy = true;
 for (var d, i = n; i > -1; --i){
  d = document.createElement('div'); d.id = 'iemsg' + i;
  d.style.height = d.style.width = a + 'px';
  d.appendChild(document.createTextNode(msg[i]));
  oi.appendChild(d); y[i] = x[i] = Y[i] = X[i] = 0;
 };
 o.appendChild(oi); document.body.appendChild(o);
 setInterval(drag, 25);
},
ascroll = function(){
 ymouse += window.pageYOffset;
 xmouse += window.pageXOffset;
 window.removeEventListener('scroll', ascroll, false);
};
o.id = 'outerCircleText'; o.style.fontSize = size + 'px';
if (window.addEventListener){
 window.addEventListener('load', init, false);
 document.addEventListener('mouseover', mouse, false);
 document.addEventListener('mousemove', mouse, false);
  if (/Apple/.test(navigator.vendor))
  window.addEventListener('scroll', ascroll, false);
}
else if (window.attachEvent){
 window.attachEvent('onload', init);
 document.attachEvent('onmousemove', mouse);
};
})();
</script>