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<script>/*
DHTML PNG Snowstorm! OO-style Jascript-based Snow effect
--------------------------------------------------------
Version 1.2.20041121a
Dependencies: GIF/PNG images (0 through 4.gif/png)
Code by Scott Schiller - www.schillmania.com
--------------------------------------------------------
Description:
Initializes after body onload() by default (via addEventHandler() call at bottom.)
Properties:
usePNG
---------------
Enables PNG images if supported ("false" disables all PNG usage)
flakeTypes
---------------
Sets the range of flake images to use (eg. a value of 5
will use images ranging from 0.png to 4.png.)
flakesMax
---------------
Sets the maximum number of snowflakes that can exist on
the screen at any given time.
flakesMaxActive
---------------
Sets the limit of "falling" snowflakes (ie. moving, thus
considered to be "active".)
vMax
---------------
Defines the maximum X and Y velocities for the storm.
A range up to this value is selected at random.
flakeWidth
---------------
The width (in pixels) of each snowflake image.
flakeHeight
---------------
Height (pixels) of each snowflake image.
flakeBottom
---------------
Limits the "bottom" coordinate of the snow.
snowCollect
---------------
Enables snow to pile up (slowly) at bottom of window.
Can be very CPU/resource-intensive over time.
*/
var snowStorm = null;
function SnowStorm() {
var s = this;
var storm = this;
this.timers = [];
this.flakes = [];
this.disabled = false;
this.terrain = [];
// User-configurable variables
// ---------------------------
var usePNG = true;
var imagePath = 'http://www.wilson.com.pt/neve/image/snow/'; // relative path to snow images
var flakeTypes = 6;
var flakesMax = 240;
var flakesMaxActive = 128;
var vMax = 2.5;
var flakeWidth = 5;
var flakeHeight = 5;
var flakeBottom = null; // Integer for fixed bottom, 0 or null for "full-screen" snow effect
var snowCollect = true;
var showStatus = true;
// --- End of user section ---
var isIE = (navigator.appName.toLowerCase().indexOf('internet explorer')+1);
var isWin9X = (navigator.appVersion.toLowerCase().indexOf('windows 98')+1);
var isOpera = (navigator.userAgent.toLowerCase().indexOf('opera ')+1 || navigator.userAgent.toLowerCase().indexOf('opera/')+1);
if (isOpera) isIE = false; // Opera (which is sneaky, pretending to be IE by default)
var screenX = null;
var screenY = null;
var scrollY = null;
var vRndX = null;
var vRndY = null;
function rnd(n,min) {
if (isNaN(min)) min = 0;
return (Math.random()*n)+min;
}
this.randomizeWind = function() {
vRndX = plusMinus(rnd(vMax,0.2));
vRndY = rnd(vMax,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.resizeHandler = function() {
if (window.innerWidth || window.innerHeight) {
screenX = window.innerWidth-(!isIE?24:2);
screenY = (flakeBottom?flakeBottom:window.innerHeight);
} else {
screenX = (document.documentElement.clientWidth||document.body.clientWidth||document.body.scrollWidth)-(!isIE?8:0);
screenY = flakeBottom?flakeBottom:(document.documentElement.clientHeight||document.body.clientHeight||document.body.scrollHeight);
}
s.scrollHandler();
}
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.freeze = function() {
// pause animation
if (!s.disabled) {
s.disabled = 1;
} else {
return false;
}
if (!isWin9X) {
clearInterval(s.timers);
} else {
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.stop = function() {
this.freeze();
for (var i=0; i<this.flakes.length; i++) {
this.flakes[i].o.style.display = 'none';
}
removeEventHandler(window,'scroll',this.scrollHandler,false);
removeEventHandler(window,'resize',this.resizeHandler,false);
}
this.SnowFlake = function(parent,type,x,y) {
var s = this;
var storm = parent;
this.type = type;
this.x = x||parseInt(rnd(screenX-12));
this.y = (!isNaN(y)?y:-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 = 2;
this.o.src = imagePath+this.type+(pngHandler.supported && usePNG?'.png':'.gif');
document.body.appendChild(this.o);
if (pngHandler.supported && usePNG) pngHandler.transform(this.o);
this.refresh = function() {
this.o.style.left = this.x+'px';
this.o.style.top = this.y+'px';
}
this.stick = function() {
s.o.style.top = (screenY+scrollY-flakeHeight-storm.terrain[Math.floor(this.x)])+'px';
// called after relative left has been called
}
this.vCheck = function() {
if (this.vX>=0 && this.vX<0.2) {
this.vX = 0.2;
} else if (this.vX<0 && this.vX>-0.2) {
this.vX = -0.2;
}
if (this.vY>=0 && this.vY<0.2) {
this.vY = 0.2;
}
}
this.move = function() {
this.x += this.vX;
this.y += (this.vY*this.vAmp);
this.refresh();
if (this.vX && screenX-this.x<flakeWidth+this.vX) { // X-axis scroll check
this.x = 0;
} else if (this.vX<0 && this.x<0-flakeWidth) {
this.x = screenX-flakeWidth; // flakeWidth;
}
var yDiff = screenY+scrollY-this.y-storm.terrain[Math.floor(this.x)];
if (yDiff<flakeHeight) {
this.active = 0;
if (snowCollect) {
var height = [0.75,1.5,0.75];
for (var i=0; i<2; i++) {
storm.terrain[Math.floor(this.x)+i+2] += height[i];
}
}
this.o.style.left = ((this.x-(!isIE?flakeWidth:0))/screenX*100)+'%'; // set "relative" left (change with resize)
if (!flakeBottom) {
this.stick();
}
}
}
this.animate = function() {
// main animation loop
// move, check status, die etc.
this.move();
}
this.setVelocities = function() {
this.vX = vRndX+rnd(vMax*0.12,0.1);
this.vY = vRndY+rnd(vMax*0.12,0.1);
}
this.recycle = function() {
this.setVelocities();
this.vCheck();
this.x = parseInt(rnd(screenX-flakeWidth-1));
this.y = parseInt(rnd(640)*-1)-flakeHeight;
this.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=this.flakes.length-1; i>0; i--) {
if (this.flakes[i].active == 1) {
this.flakes[i].animate();
active++;
} else if (this.flakes[i].active == 0) {
used++;
} else {
waiting++;
}
}
if (snowCollect && !waiting) { // !active && !waiting
// create another batch of snow
this.createSnow(flakesMaxActive,true);
}
if (active<flakesMaxActive) {
with (this.flakes[parseInt(rnd(this.flakes.length))]) {
if (!snowCollect && active == 0) {
recycle();
} else if (active == -1) {
active = 1;
}
}
}
}
this.createSnow = function(limit,allowInactive) {
if (showStatus) window.status = 'Creating snow...';
for (var i=0; i<limit; i++) {
this.flakes[this.flakes.length] = new this.SnowFlake(this,parseInt(rnd(flakeTypes)));
if (allowInactive || i>flakesMaxActive) this.flakes[this.flakes.length-1].active = -1;
}
if (showStatus) window.status = '';
}
this.timerInit = function() {
this.timers = (!isWin9X?setInterval("snowStorm.snow()",20):[setInterval("snowStorm.snow()",75),setInterval("snowStorm.snow()",25)]);
}
this.init = function() {
for (var i=0; i<8192; i++) {
this.terrain[i] = 0;
}
this.randomizeWind();
this.createSnow(snowCollect?flakesMaxActive:flakesMaxActive*2); // create initial batch
addEventHandler(window,'resize',this.resizeHandler,false);
addEventHandler(window,'scroll',this.scrollHandler,false);
// addEventHandler(window,'scroll',this.resume,false); // scroll does not cause window focus. (odd)
// addEventHandler(window,'blur',this.freeze,false);
// addEventHandler(window,'focus',this.resume,false);
this.timerInit();
}
this.resizeHandler(); // get screen coordinates
if (screenX && screenY && !this.disabled) {
this.init();
}
}
function snowStormInit() {
setTimeout("snowStorm = new SnowStorm()",500);
}
// Generic addEventHandler() wrapper
// ---------------------------------
// A generic interface for adding DOM event handlers
// Version 1.2.20040404
//
// Code by Scott Schiller | schillmania.com
//
// Revision history:
// ---------------------------------
// v1.1.20031218: initial deploy
// v1.2.20040404: added post-load event check
var addEventHandler = null;
var removeEventHandler = null;
function postLoadEvent(eventType) {
// test for adding an event to the body (which has already loaded) - if so, fire immediately
return ((eventType.toLowerCase().indexOf('load')>=0) && document.body);
}
function addEventHandlerDOM(o,eventType,eventHandler,eventBubble) {
if (!postLoadEvent(eventType)) {
o.addEventListener(eventType,eventHandler,eventBubble);
} else {
eventHandler();
}
}
function removeEventHandlerDOM(o,eventType,eventHandler,eventBubble) {
o.removeEventListener(eventType,eventHandler,eventBubble);
}
function addEventHandlerIE(o,eventType,eventHandler) { // IE workaround
if (!eventType.indexOf('on')+1) eventType = 'on'+eventType;
if (!postLoadEvent(eventType)) {
o.attachEvent(eventType,eventHandler); // Note addition of "on" to event type
} else {
eventHandler();
}
}
function removeEventHandlerIE(o,eventType,eventHandler) {
if (!eventType.indexOf('on')+1) eventType = 'on'+eventType;
o.detachEvent(eventType,eventHandler);
}
function addEventHandlerOpera(o,eventType,eventHandler,eventBubble) {
if (!postLoadEvent(eventType)) {
(o==window?document:o).addEventListener(eventType,eventHandler,eventBubble);
} else {
eventHandler();
}
}
function removeEventHandlerOpera(o,eventType,eventHandler,eventBubble) {
(o==window?document:o).removeEventListener(eventType,eventHandler,eventBubble);
}
if (navigator.userAgent.toLowerCase().indexOf('opera ')+1 || navigator.userAgent.toLowerCase().indexOf('opera/')+1) {
// opera is dumb at times.
addEventHandler = addEventHandlerOpera;
removeEventHandler = removeEventHandlerOpera;
} else if (document.addEventListener) { // DOM event handler method
addEventHandler = addEventHandlerDOM;
removeEventHandler = removeEventHandlerDOM;
} else if (document.attachEvent) { // IE event handler method
addEventHandler = addEventHandlerIE;
removeEventHandler = removeEventHandlerIE;
} else { // Neither "DOM level 2" (?) methods supported
addEventHandler = function(o,eventType,eventHandler,eventBubble) {
o['on'+eventType] = eventHandler;
// Multiple events could be added here via array etc.
}
removeEventHandler = function(o,eventType,eventHandler,eventBubble) {}
}
// Safari 1.0 does not support window.scroll events - apparently netscape 6.0/6.2 and mozilla 1.4 also.
// Refer to events support table at http://www.quirksmode.org/js/events_compinfo.html
// -- end addEventHandler definition --
/*
PNGHandler: Object-Oriented Javascript-based PNG wrapper
--------------------------------------------------------
Version 1.2.20040803
Code by Scott Schiller - www.schillmania.com
--------------------------------------------------------
Description:
Provides gracefully-degrading PNG functionality where
PNG is supported natively or via filters (Damn you, IE!)
Should work with PNGs as images and DIV background images.
--------------------------------------------------------
Revision history
--------------------------------------------------------
1.2
- Added refresh() for changing PNG images under IE
- Class extension: "scale" causes PNG to scale under IE
--------------------------------------------------------
Known bugs
--------------------------------------------------------
- ie:mac doesn't support PNG background images.
- Safari doesn't support currentStyle() - can't parse BG
via CSS (ie. for a DIV with a PNG background by class)
*/
function PNGHandler() {
var self = this;
this.na = navigator.appName.toLowerCase();
this.nv = navigator.appVersion.toLowerCase();
this.isIE = this.na.indexOf('internet explorer')+1?1:0;
this.isWin = this.nv.indexOf('windows')+1?1:0;
this.isIEMac = (this.isIE&&!this.isWin);
this.isIEWin = (this.isIE&&this.isWin);
this.ver = this.isIE?parseFloat(this.nv.split('msie ')[1]):parseFloat(this.nv);
this.isMac = this.nv.indexOf('mac')+1?1:0;
this.isOpera = (navigator.userAgent.toLowerCase().indexOf('opera ')+1 || navigator.userAgent.toLowerCase().indexOf('opera/')+1);
if (this.isOpera) this.isIE = false; // Opera filter catch (which is sneaky, pretending to be IE by default)
this.filterID = 'DXImageTransform.Microsoft.AlphaImageLoader';
this.supported = false;
this.transform = self.doNothing;
this.filterMethod = function(o) {
// IE 5.5+ proprietary filter garbage (boo!)
// Create new element based on old one. Doesn't seem to render properly otherwise (due to filter?)
// use DOM "currentStyle" method, so rules inherited via CSS are picked up.
if (o.nodeName != 'IMG') {
var b = o.currentStyle.backgroundImage.toString(); // parse out background image URL
o.style.backgroundImage = 'none';
// Parse out background image URL from currentStyle.
var i1 = b.indexOf('url("')+5;
var newSrc = b.substr(i1,b.length-i1-2).replace('.gif','.png'); // find first instance of ") after (", chop from string
o.style.writingMode = 'lr-tb'; // Has to be applied so filter "has layout" and is displayed. Seriously. Refer to http://msdn.microsoft.com/workshop/author/filter/reference/filters/alphaimageloader.asp?frame=true
o.style.filter = "progid:"+self.filterID+"(src='"+newSrc+"',sizingMethod='"+(o.className.indexOf('scale')+1?'scale':'crop')+"')";
} else if (o.nodeName == 'IMG') {
var newSrc = o.getAttribute('src').replace('.gif','.png');
// apply filter
o.src = 'image/none.gif'; // get rid of image
o.style.filter = "progid:"+self.filterID+"(src='"+newSrc+"',sizingMethod="+(o.className.indexOf('scale')+1?'scale':'crop')+"')";
o.style.writingMode = 'lr-tb'; // Has to be applied so filter "has layout" and is displayed. Seriously. Refer to http://msdn.microsoft.com/workshop/author/filter/reference/filters/alphaimageloader.asp?frame=true
}
}
this.pngMethod = function(o) {
// Native transparency support. Easy to implement. (woo!)
bgImage = this.getBackgroundImage(o);
if (bgImage) {
// set background image, replacing .gif
o.style.backgroundImage = 'url('+bgImage.replace('.gif','.png')+')';
} else if (o.nodeName == 'IMG') {
o.src = o.src.replace('.gif','.png');
} else if (!bgImage) {
// no background image
}
}
this.getBackgroundImage = function(o) {
var b, i1; // background-related variables
var bgUrl = null;
if (o.nodeName != 'IMG' && !(this.isIE && this.isMac)) { // ie:mac PNG support broken for DIVs with PNG backgrounds
if (document.defaultView) {
if (document.defaultView.getComputedStyle) {
b = document.defaultView.getComputedStyle(o,'').getPropertyValue('background-image');
i1 = b.indexOf('url(')+4;
bgUrl = b.substr(i1,b.length-i1-1);
} else {
// no computed style
return false;
}
} else {
// no default view
return false;
}
}
return bgUrl;
}
this.doNothing = function() {}
this.supportTest = function() {
// Determine method to use.
// IE 5.5+/win32: filter
if (this.isIE && this.isWin && this.ver >= 5.5) {
// IE proprietary filter method (via DXFilter)
self.transform = self.filterMethod;
} else if (!this.isIE && this.ver < 5) {
// No PNG support or broken support
// Leave existing content as-is
self.transform = null;
return false;
} else if (!this.isIE && this.ver >= 5 || (this.isIE && this.isMac && this.ver >= 5)) { // version 5+ browser (not IE), or IE:mac 5+
self.transform = self.pngMethod;
} else {
// Presumably no PNG support. GIF used instead.
self.transform = null;
return false;
}
return true;
}
this.init = function() {
this.supported = this.supportTest();
}
}
function getElementsByClassName(className,oParent) {
var doc = (oParent||document);
var matches = [];
var nodes = doc.all||doc.getElementsByTagName('*');
for (var i=0; i<nodes.length; i++) {
if (nodes[i].className == className || nodes[i].className.indexOf(className)+1 || nodes[i].className.indexOf(className+' ')+1 || nodes[i].className.indexOf(' '+className)+1) {
matches[matches.length] = nodes[i];
}
}
return matches; // kids, don't play with fire. ;)
}
// Instantiate and initialize PNG Handler
var pngHandler = new PNGHandler();
pngHandler.init();
addEventHandler(window,'load',snowStormInit,false);
</script>
Hayatta üç şey insanın özüne zarar verir; öfke,açgözlülük, kibir.. Hz.Muhammed (s.a.v)
