Fantasmas en el blog – Promotional Code – Dominios

Para quienes les gustadisfrazar su blog en Halloween, o para quienes les gusta tener adornos macabros en el blog, este script les ayudará a darle ese aspecto de terror con unosfantasmas volando por todo el blog.

Puedes ver el ejemplo eneste blog poseído de pruebas.

Ponerlo en el blog es sumamente sencillo, sólo basta entrar enDiseño | Elementos de la página | Añadir gadget | HTML/Javascript y ahí pegar este código:

script language="JavaScript"
if ((document.getElementById) &&
window.addEventListener || window.attachEvent){
(function(){

//Configuracion

var numberOfGhosts = 10;/* Numero de fantasmas */
var ghostSpeed = 0.9;/* Velocidad */
var inTheFace = 5;
var setTimeOutSpeed = 50;/* Velocidad a la que desaparecen */

//Fin de la configuracion

var h,y,cy,cx,sy,sx,ref,field,oy1,oy2,ox1,ox2,iy1,iy2,ix1,ix2;
var d = document;
var domWw = (typeof window.innerWidth == "number");
var domSy = (typeof window.pageYOffset == "number");
var pi1 = 180/3.14;
var pi2 = 3.14/180;
var y = [];
var x = [];
var strs = [];
var gro = [];
var dim = [];
var dfc = [];
var vel = [];
var dir = [];
var acc = [];
var dtor = [];
var xy2 = [];
var idx = document.getElementsByTagName('div').length;
var zip = [];
var pix = "px";

for (i = 0; i numberOfGhosts; i++){
document.write('div id="ghosts'+(idx+i)+'"'
+' style="position:absolute;top:0px;left:0px;'
+'width:40px;height:40px;background-color:transparent;'
+'font-size:0px;"img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJaDHwwDIVDVKLPQ0Iquv_Ybt1jIRA34GxVrZoWErI4lZf5VQy37XQ5vyoPPdgbwxaApRmHuq2dxIggcc1JGKyKVZLKsHzt49VAwBJ5byFnn0XQPj8LevgZOZ_rubjJB9oDgfvsrRNF7c/s1600/ghost.gif" class="ghost" width="70"//div');
}

if (domWw) ref = window;
else{
if (d.documentElement &&
typeof d.documentElement.clientWidth == "number" &&
d.documentElement.clientWidth != 0)
ref = d.documentElement;
else{
if (d.body &&
typeof d.body.clientWidth == "number")
ref = d.body;
}
}

function win(){
var mozBar = ((domWw) &&
ref.innerWidth != d.documentElement.offsetWidth)?20:0;
h = (domWw)?ref.innerHeight:ref.clientHeight;
w = (domWw)?ref.innerWidth - mozBar:ref.clientWidth;
cy = Math.floor(h/2);
cx = Math.floor(w/2);

oy1 = (75 * h / 100);
oy2 = (oy1 / 2);
ox1 = (75 * w / 100);
ox2 = (ox1 / 2);

iy1 = (18 * h / 100);
iy2 = (iy1 / 2);
ix1 = (18 * w / 100);
ix2 = (ix1 / 2);

field = (h w)?h:w;
}

function rst(s){
var cyx;
sy = (domSy)?ref.pageYOffset:ref.scrollTop;
sx = (domSy)?ref.pageXOffset:ref.scrollLeft;
acc[s] = 0;
dim[s] = 1;
xy2[s] = 0;
cyx = Math.round(Math.random() * 2);
if (cyx == 0){
y[s] = (cy - iy2) + Math.floor(Math.random() * iy1);
x[s] = (cx - ix2) + Math.floor(Math.random() * ix1);
}
else{
y[s] = (cy - oy2) + Math.floor(Math.random() * oy1);
x[s] = (cx - ox2) + Math.floor(Math.random() * ox1);
}
dy = y[s] - cy;
dx = x[s] - cx;
dir[s] = Math.atan2(dy,dx) * pi1;
dfc[s] = Math.sqrt(dy*dy + dx*dx) ;
zip[s] = 10 * (dfc[s] + inTheFace) / 100;
vel[s] = ghostSpeed * dfc[s] / 100;
dtor[s] = (field - dfc[s]);
if (dtor[s] 1) dtor[s] = 1;
gro[s] = 0.003 * dtor[s] / 100;
}

function animate(){
for (i = 0; i numberOfGhosts; i++){
y[i] += vel[i] * Math.sin(dir[i] * pi2);
x[i] += vel[i] * Math.cos(dir[i] * pi2);
acc[i] = (vel[i] / (dfc[i] + (vel[i] * zip[i])) * vel[i]);
vel[i] += (acc[i]);
dim[i] += gro[i] + acc[i] / zip[i];
xy2[i] = dim[i] / 2;
if (y[i] 0 + xy2[i] ||
x[i] 0 + xy2[i] ||
y[i] h - xy2[i] ||
x[i] w - xy2[i]){
rst(i);
}
strs[i].top = (y[i] - xy2[i]) + sy + pix;
strs[i].left = (x[i] - xy2[i]) + sx + pix;
strs[i].width = (strs[i].height = (Math.round(dim[i])) + pix);
}
setTimeout(animate,setTimeOutSpeed);
}

function init(){
win();
for (i = 0; i numberOfGhosts; i++){
strs[i] = document.getElementById("ghosts"+(idx+i)).style;
rst(i);
}
animate();
}

if (window.addEventListener){
window.addEventListener("resize",win,false);
window.addEventListener("load",init,false);
}
else if (window.attachEvent){
window.attachEvent("onresize",win);
window.attachEvent("onload",init);
}
})();
}//End.

/script

style
.ghost {
filter:alpha(opacity=30);
-moz-opacity: 0.3;
opacity: 0.3;
-khtml-opacity: 0.3;
}
html {
overflow-x:hidden;
}
/style

Con eso ya tendrán los fantasmas merodeando el blog. Se pueden modificar algunos valores de velocidad al gusto, esos se modifican en las anotaciones que he puesto en colorverde.

NOTA: En las plantillas del diseñador de Blogger no funciona muy bien. Raro ¿no?

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