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Forum » Ajutor UCOZ » Scripturi » Script ninsoare
Script ninsoare
sergiuDate: Tuesday, 2009-12-15, 2:18 PM | Message # 1
Major general
Group: Administrators
Messages: 437
Reputation: 0
Status: Offline
Code
<script>
<!--
var snowStorm = null;

function SnowStorm() {

   // PROPERTIES
   // ------------------

   var imagePath = 'http://stargagicu.t35.com/snow/'; // relative path to snow images (including trailing slash)
   var flakesMax = 128;
   var flakesMaxActive = 64;
   var vMaxX = 8;
   var vMaxY = 4;
   var usePNG = true;
   var flakeBottom = null; // Integer for fixed bottom, 0 or null for "full-screen" snow effect
   var snowStick = true;
   var snowCollect = false;
   var targetElement = null; // element which snow will be appended to (document body if undefined)
   var followMouse = true;
   var flakeTypes = 6;
   var flakeWidth = 5;
   var flakeHeight = 5;

   // ------------------

   var zIndex = 0; // CSS stacking order applied to each snowflake
   var flakeLeftOffset = 0; // amount to subtract from edges of container
   var flakeRightOffset = 0; // amount to subtract from edges of container

   // --- End of user section ---

   var addEvent = function(o,evtName,evtHandler) {
   typeof(attachEvent)=='undefined'?o.addEventListener(evtName,evtHandler,false):o.attachEvent('on'+evtName,evtHandler);
   }

   var removeEvent = function(o,evtName,evtHandler) {
   typeof(attachEvent)=='undefined'?o.removeEventListener(evtName,evtHandler,false):o.detachEvent('on'+evtName,evtHandler);
   }

   var classContains = function(o,cStr) {
   return (typeof(o.className)!='undefined'?o.className.indexOf(cStr)+1:false);
   }

   var s = this;
   var storm = this;
   this.timers = [];
   this.flakes = [];
   this.disabled = false;
   this.terrain = [];
   this.active = false;

   var isIE = navigator.userAgent.match(/msie/i);
   var isIE6 = navigator.userAgent.match(/msie 6/i);
   var isOldIE = (isIE && (isIE6 || navigator.userAgent.match(/msie 5/i)));
   var isWin9X = navigator.appVersion.match(/windows 98/i);
   var isiPhone = navigator.userAgent.match(/iphone/i);
   var isOpera = navigator.userAgent.match(/opera/i);
   if (isOpera) isIE = false; // Opera (which may be sneaky, pretending to be IE by default)
   var screenX = null;
   var screenX2 = null;
   var screenY = null;
   var scrollY = null;
   var vRndX = null;
   var vRndY = null;
   var windOffset = 1;
   var windMultiplier = 2;
   var pngSupported = (!isIE || (isIE && !isIE6 && !isOldIE)); // IE <7 doesn't do PNG nicely without crap filters
   var docFrag = document.createDocumentFragment();
   this.oControl = null; // toggle element
   if (flakeLeftOffset == null) flakeLeftOffset = 0;
   if (flakeRightOffset == null) flakeRightOffset = 0;

   function rnd(n,min) {
   if (isNaN(min)) min = 0;
   return (Math.random()*n)+min;
   }

   this.randomizeWind = function() {
   vRndX = plusMinus(rnd(vMaxX,0.2));
   vRndY = rnd(vMaxY,0.2);
   if (this.flakes) {
   for (var i=0; i<this.flakes.length; i++) {
   if (this.flakes[i].active) this.flakes[i].setVelocities();
   }
   }
   }

   function plusMinus(n) {
   return (parseInt(rnd(2))==1?n*-1:n);
   }

   this.scrollHandler = function() {
   // "attach" snowflakes to bottom of window if no absolute bottom value was given
   scrollY = (flakeBottom?0:parseInt(window.scrollY||document.documentElement.scrollTop||document.body.scrollTop));
   if (isNaN(scrollY)) scrollY = 0; // Netscape 6 scroll fix
   if (!flakeBottom && s.flakes) {
   for (var i=0; i<s.flakes.length; i++) {
   if (s.flakes[i].active == 0) s.flakes[i].stick();
   }
   }
   }

   this.resizeHandler = function() {
   if (window.innerWidth || window.innerHeight) {
   screenX = window.innerWidth-(!isIE?16:2)-flakeRightOffset;
   screenY = (flakeBottom?flakeBottom:window.innerHeight);
   } else {
   screenX = (document.documentElement.clientWidth||document.body.clientWidth||document.body.scrollWidth)-(!isIE?8:0)-flakeRightOffset;
   screenY = flakeBottom?flakeBottom:(document.documentElement.clientHeight||document.body.clientHeight||document.body.scrollHeight);
   }
   screenX2 = parseInt(screenX/2);
   }

   this.resizeHandlerAlt = function() {
   screenX = targetElement.offsetLeft+targetElement.offsetWidth-flakeRightOffset;
   screenY = flakeBottom?flakeBottom:targetElement.offsetTop+targetElement.offsetHeight;
   screenX2 = parseInt(screenX/2);
   }

   this.freeze = function() {
   // pause animation
   if (!s.disabled) {
   s.disabled = 1;
   } else {
   return false;
   }
   for (var i=0; i<s.timers.length; i++) {
   clearInterval(s.timers[i]);
   }
   }

   this.resume = function() {
   if (s.disabled) {
   s.disabled = 0;
   } else {
   return false;
   }
   s.timerInit();
   }

   this.toggleSnow = function() {
   if (!s.flakes.length) {
   // first run
   s.start();
   s.setControlActive(true);
   } else {
   s.active = !s.active;
   if (s.active) {
   s.show();
   s.resume();
   s.setControlActive(true);
   } else {
   s.stop();
   s.freeze();
   s.setControlActive(false);
   }
   }
   }

   this.setControlActive = function(bActive) {
   // Y.D[(bActive?'addClass':'removeClass')](s.oControl,'active');
   }

   this.stop = function() {
   this.freeze();
   for (var i=this.flakes.length; i--;) {
   this.flakes[i].o.style.display = 'none';
   }
   removeEvent(window,'scroll',s.scrollHandler);
   removeEvent(window,'resize',s.resizeHandler);
   if (!isIE) {
   removeEvent(window,'blur',s.freeze);
   removeEvent(window,'focus',s.resume);
   }
   // removeEventHandler(window,'resize',this.resizeHandler,false);
   }

   this.show = function() {
   for (var i=this.flakes.length; i--;) {
   this.flakes[i].o.style.display = 'block';
   }
   }

   this.SnowFlake = function(parent,type,x,y) {
   var s = this;
   var storm = parent;
   this.type = type;
   this.x = x||parseInt(rnd(screenX-20));
   this.y = (!isNaN(y)?y:-rnd(screenY)-12);
   this.vX = null;
   this.vY = null;
   this.vAmpTypes = [2.0,1.0,1.25,1.0,1.5,1.75]; // "amplification" for vX/vY (based on flake size/type)
   this.vAmp = this.vAmpTypes[this.type];

   this.active = 1;
   this.o = document.createElement('img');
   this.o.style.position = 'absolute';
   this.o.style.width = flakeWidth+'px';
   this.o.style.height = flakeHeight+'px';
   this.o.style.fontSize = '1px'; // so IE keeps proper size
   this.o.style.zIndex = zIndex;
   this.o.src = imagePath+this.type+(pngSupported && usePNG?'.png':'.gif');
   docFrag.appendChild(this.o);

   this.refresh = function() {
   s.o.style.left = s.x+'px';
   s.o.style.top = s.y+'px';
   }

   this.stick = function() {
   if (isIE6 || isiPhone || (targetElement != document.documentElement && targetElement != document.body)) {
   s.o.style.top = (screenY+scrollY-flakeHeight-storm.terrain[Math.floor(s.x)])+'px';
   } else {
   s.o.style.display = 'none';
   s.o.style.top = 'auto';
   s.o.style.bottom = '0px';
   s.o.style.position = 'fixed';
   s.o.style.display = 'block';
   }
   }

   this.vCheck = function() {
   if (s.vX>=0 && s.vX<0.2) {
   s.vX = 0.2;
   } else if (s.vX<0 && s.vX>-0.2) {
   s.vX = -0.2;
   }
   if (s.vY>=0 && s.vY<0.2) {
   s.vY = 0.2;
   }
   }

   this.move = function() {
   s.x += s.vX*windOffset;
   s.y += (s.vY*s.vAmp);
   s.refresh();
   if (s.vX && screenX-s.x<flakeWidth+(s.vX*windOffset)) { // X-axis scroll check
   s.x = 0;
   } else if ((s.vX<0 || windOffset<0)&& s.x-flakeLeftOffset<0-flakeWidth) {
   s.x = screenX-flakeWidth; // flakeWidth;
   }
   var yDiff = screenY+scrollY-s.y-storm.terrain[Math.floor(s.x)];
   if (yDiff<flakeHeight) {
   s.active = 0;
   if (snowCollect && snowStick) {
   var height = [0.75,1.5,0.75];
   for (var i=0; i<2; i++) {
   storm.terrain[Math.floor(s.x)+i+2] += height[i];
   }
   }
   s.o.style.left = (s.x/screenX*100)+'%'; // set "relative" left (change with resize)
   if (!flakeBottom) {
   if (snowStick) {
   s.stick();
   } else {
   s.recycle();
   }
   }
   }
   }

   this.animate = function() {
   // main animation loop
   // move, check status, die etc.
   s.move();
   }

   this.setVelocities = function() {
   s.vX = vRndX+rnd(vMaxX*0.12,0.1);
   s.vY = vRndY+rnd(vMaxY*0.12,0.1);
   }

   this.recycle = function() {
   s.o.style.display = 'none';
   s.o.style.position = 'absolute';
   s.o.style.bottom = 'auto';
   s.setVelocities();
   s.vCheck();
   s.x = parseInt(rnd(screenX-flakeWidth-20));
   s.y = parseInt(rnd(screenY)*-1)-flakeHeight;
   s.o.style.left = s.x+'px';
   s.o.style.top = s.y+'px';
   s.o.style.display = 'block';
   s.active = 1;
   }

   this.recycle(); // set up x/y coords etc.
   this.refresh();

   }

   this.snow = function() {
   var active = 0;
   var used = 0;
   var waiting = 0;
   for (var i=s.flakes.length; i--;) {
   if (s.flakes[i].active == 1) {
   s.flakes[i].move();
   active++;
   } else if (s.flakes[i].active == 0) {
   used++;
   } else {
   waiting++;
   }
   }
   if (snowCollect && !waiting) { // !active && !waiting
   // create another batch of snow
   s.createSnow(flakesMaxActive,true);
   }
   if (active<flakesMaxActive) {
   with (s.flakes[parseInt(rnd(s.flakes.length))]) {
   if (!snowCollect && active == 0) {
   recycle();
   } else if (active == -1) {
   active = 1;
   }
   }
   }
   }

   this.mouseMove = function(e) {
   if (!followMouse) return true;
   var x = parseInt(e.clientX);
   if (x<screenX2) {
   windOffset = -windMultiplier+(x/screenX2*windMultiplier);
   } else {
   x -= screenX2;
   windOffset = (x/screenX2)*windMultiplier;
   }
   }

   this.createSnow = function(limit,allowInactive) {
   for (var i=0; i<limit; i++) {
   s.flakes[s.flakes.length] = new s.SnowFlake(s,parseInt(rnd(flakeTypes)));
   if (allowInactive || i>flakesMaxActive) s.flakes[s.flakes.length-1].active = -1;
   }
   targetElement.appendChild(docFrag);
   }

   this.timerInit = function() {
   s.timers = (!isWin9X?[setInterval(s.snow,20)]:[setInterval(s.snow,75),setInterval(s.snow,25)]);
   }

   this.init = function() {
   for (var i=0; i<2048; i++) {
   s.terrain[i] = 0;
   }
   s.randomizeWind();
   s.createSnow(snowCollect?flakesMaxActive:flakesMaxActive*2); // create initial batch
   addEvent(window,'resize',s.resizeHandler);
   addEvent(window,'scroll',s.scrollHandler);
   if (!isIE) {
   addEvent(window,'blur',s.freeze);
   addEvent(window,'focus',s.resume);
   }
   s.resizeHandler();
   s.scrollHandler();
   if (followMouse) {
   addEvent(document,'mousemove',s.mouseMove);
   }
   s.timerInit();
   }

   var didInit = false;

   this.start = function(bFromOnLoad) {
   if (!didInit) {
   didInit = true;
   } else if (bFromOnLoad) {
   // already loaded and running
   return true;
   }
   if (typeof targetElement == 'string') {
   targetElement = document.getElementById(targetElement);
   if (!targetElement) throw new Error('Snowstorm: Unable to get targetElement');
   }
   if (!targetElement) {
   targetElement = (!isIE?(document.documentElement?document.documentElement:document.body):document.body);
   }
   if (targetElement != document.documentElement && targetElement != document.body) s.resizeHandler = s.resizeHandlerAlt; // re-map handler to get element instead of screen dimensions
   s.resizeHandler(); // get bounding box elements
   if (screenX && screenY && !s.disabled) {
   s.init();
   s.active = true;
   }
   }

   if (document.addEventListener) {
   // safari 3.0.4 doesn't do DOMContentLoaded, maybe others - use a fallback to be safe.
   document.addEventListener('DOMContentLoaded',function(){s.start(true)},false);
   window.addEventListener('load',function(){s.start(true)},false);
   } else {
   addEvent(window,'load',function(){s.start(true)});
   }

}

snowStorm = new SnowStorm();

// -->

</script>


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