Code tạo chữ chạy quanh chuột

type="text/javascript">


;(function(){


var msg =
"Trần Văn Sách - K41TĐH4";


var size = 18;


var circleY =
0.75; var circleX = 2;


var letter_spacing
= 5;


var diameter = 10;


var rotation =
0.7;


var speed = 0.5;






////////////////////// 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);


};





})();