Уроки Photoshop

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document.getElementsByClassName = function(className) {  
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  elements.push(child);  
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  return elements;  
}  

var Reflection = {  
  defaultHeight : 0.5,  
  defaultOpacity: 0.5,  
   
  add: function(image, options) {  
  Reflection.remove(image);  
   
  doptions = { "height" : Reflection.defaultHeight, "opacity" : Reflection.defaultOpacity }  
  if (options) {  
  for (var i in doptions) {  
  if (!options[i]) {  
  options[i] = doptions[i];  
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  try {  
  var d = document.createElement('div');  
  var p = image;  
   
  var classes = p.className.split(' ');  
  var newClasses = '';  
  for (j=0;j<classes.length;j++) {  
  if (classes[j] != "userAvatar") {  
  if (newClasses) {  
  newClasses += ' '  
  }  
   
  newClasses += classes[j];  
  }  
  }  

  var reflectionHeight = Math.floor(p.height*options['height']);  
  var divHeight = Math.floor(p.height*(1+options['height']));  
   
  var reflectionWidth = p.width;  
   
  if (document.all && !window.opera) {  
  /* Copy original image's classes & styles to div */  
  d.className = newClasses;  
  p.className = 'reflected';  
   
  d.style.cssText = p.style.cssText;  
  p.style.cssText = 'vertical-align: bottom';  
   
  var reflection = document.createElement('img');  
  reflection.src = p.src;  
  reflection.style.width = reflectionWidth+'px';  
   
  reflection.style.marginBottom = "-"+(p.height-reflectionHeight)+'px';  
  reflection.style.filter = 'flipv progid:DXImageTransform.Microsoft.Alpha(opacity='+(options['opacity']*100)+', style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy='+(options['height']*100)+')';  
   
  d.style.width = reflectionWidth+'px';  
  d.style.height = divHeight+'px';  
  p.parentNode.replaceChild(d, p);  
   
  d.appendChild(p);  
  d.appendChild(reflection);  
  } else {  
  var canvas = document.createElement('canvas');  
  if (canvas.getContext) {  
  /* Copy original image's classes & styles to div */  
  d.className = newClasses;  
  p.className = 'reflected';  
   
  d.style.cssText = p.style.cssText;  
  p.style.cssText = 'vertical-align: bottom';  
   
  var context = canvas.getContext("2d");  
   
  canvas.style.height = reflectionHeight+'px';  
  canvas.style.width = reflectionWidth+'px';  
  canvas.height = reflectionHeight;  
  canvas.width = reflectionWidth;  
   
  d.style.width = reflectionWidth+'px';  
  d.style.height = divHeight+'px';  
  p.parentNode.replaceChild(d, p);  
   
  d.appendChild(p);  
  d.appendChild(canvas);  
   
  context.save();  
   
  context.translate(0,image.height-1);  
  context.scale(1,-1);  
   
  context.drawImage(image, 0, 0, reflectionWidth, image.height);  
   
  context.restore();  
   
  context.globalCompositeOperation = "destination-out";  
  var gradient = context.createLinearGradient(0, 0, 0, reflectionHeight);  
   
  gradient.addColorStop(1, "rgba(255, 255, 255, 1.0)");  
  gradient.addColorStop(0, "rgba(255, 255, 255, "+(1-options['opacity'])+")");  
   
  context.fillStyle = gradient;  
  if (navigator.appVersion.indexOf('WebKit') != -1) {  
  context.fill();  
  } else {  
  context.fillRect(0, 0, reflectionWidth, reflectionHeight*2);  
  }  
  }  
  }  
  } catch (e) {  
  }  
  },  
   
  remove : function(image) {  
  if (image.className == "reflected") {  
  image.className = image.parentNode.className;  
  image.parentNode.parentNode.replaceChild(image, image.parentNode);  
  }  
  }  
}  

function addReflections() {  
  var rimages = document.getElementsByClassName('userAvatar');  
  for (i=0;i<rimages.length;i++) {  
  var rheight = null;  
  var ropacity = null;  
   
  var classes = rimages[i].className.split(' ');  
  for (j=0;j<classes.length;j++) {  
  if (classes[j].indexOf("rheight") == 0) {  
  var rheight = classes[j].substring(7)/100;  
  } else if (classes[j].indexOf("ropacity") == 0) {  
  var ropacity = classes[j].substring(8)/100;  
  }  
  }  
   
  Reflection.add(rimages[i], { height: rheight, opacity : ropacity});  
  }  
}  

var previousOnload = window.onload;  
window.onload = function () { if(previousOnload) previousOnload(); addReflections(); }  
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