var loadingImage = '/imagens/layout/lightbox/loading.gif';		
var closeButton = '/imagens/layout/lightbox/close.gif';		
function getPageScroll() {
 var yScroll;
  if (self.pageYOffset) {
   yScroll = self.pageYOffset;
  }
  else if (document.documentElement && document.documentElement.scrollTop) {
   yScroll = document.documentElement.scrollTop;
  } else if (document.body) {
   yScroll = document.body.scrollTop;
  }
  arrayPageScroll = new Array('',yScroll)
 return arrayPageScroll;
}

function getPageSize() {
 var xScroll, yScroll;
  if (window.innerHeight && window.scrollMaxY) {
   xScroll = document.body.scrollWidth;
   yScroll = window.innerHeight + window.scrollMaxY;
  }
  else if (document.body.scrollHeight > document.body.offsetHeight) {
   xScroll = document.body.scrollWidth;
   yScroll = document.body.scrollHeight;
  }
  else {
   xScroll = document.body.offsetWidth;
   yScroll = document.body.offsetHeight;
  }
 var windowWidth, windowHeight;
  if (self.innerHeight) {
   windowWidth = self.innerWidth;
   windowHeight = self.innerHeight;
  }

  else if (document.documentElement && document.documentElement.clientHeight) {
   windowWidth = document.documentElement.clientWidth;
   windowHeight = document.documentElement.clientHeight;
  }

  else if (document.body) {
   windowWidth = document.body.clientWidth;
   windowHeight = document.body.clientHeight;
  }
  
  if (yScroll < windowHeight) {
   pageHeight = windowHeight;
  }
  
  else {
   pageHeight = yScroll;
  }
  
  if (xScroll < windowWidth) {
   pageWidth = windowWidth;
  }
  
  else {
   pageWidth = xScroll;
  }
  
  arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
 return arrayPageSize;
}

function pause(numberMillis) {
 var now = new Date();
 var exitTime = now.getTime() + numberMillis;
 while (true) {
  now = new Date();
  if (now.getTime() > exitTime)
 return;
 }
}

function getKey(e) {
 if (e == null) {
  keycode = event.keyCode;
 }

 else {
  keycode = e.which;
 }
 
 key = String.fromCharCode(keycode).toLowerCase();
 if (key == 'x'){ hideLightbox(); }
}

function listenKey () {	document.onkeypress = getKey; }
function showLightbox(objLink) {
 var objOverlay = document.getElementById('overlay');
 var objLightbox = document.getElementById('lightbox');
 var objCaption = document.getElementById('lightboxCaption');
 var objImage = document.getElementById('lightboxImage');
 var objLoadingImage = document.getElementById('loadingImage');
 var objLightboxDetails = document.getElementById('lightboxDetails');
 var arrayPageSize = getPageSize();
 var arrayPageScroll = getPageScroll();
 if (objLoadingImage) {
  objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
  objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
  objLoadingImage.style.display = 'block';
 }

 objOverlay.style.height = (arrayPageSize[1] + 'px');
 objOverlay.style.display = 'block';

 imgPreload = new Image();
 imgPreload.onload=function() {
  objImage.src = objLink.href;
   var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2);
   var lightboxLeft = ((arrayPageSize[0] - 20 - imgPreload.width) / 2);
   objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
   objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
   objLightboxDetails.style.width = imgPreload.width + 'px';
   
   if(objLink.getAttribute('title')) {
    objCaption.style.display = 'block';
	objCaption.innerHTML = objLink.getAttribute('title');
   }

   else {
    objCaption.style.display = 'none';
   }

   if (navigator.appVersion.indexOf("MSIE")!=-1) {
    pause(250);
   }

   if (objLoadingImage) { objLoadingImage.style.display = 'none'; }
   objLightbox.style.display = 'block';
    arrayPageSize = getPageSize();
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	listenKey();
	return false;
   }
  imgPreload.src = objLink.href;
}

function hideLightbox() {
 objOverlay = document.getElementById('overlay');
 objLightbox = document.getElementById('lightbox');
 objOverlay.style.display = 'none';
 objLightbox.style.display = 'none';
 document.onkeypress = '';
}

function initLightbox() {
 if (!document.getElementsByTagName){ return; }
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
  var anchor = anchors[i];
  if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")) {
   anchor.onclick = function () {showLightbox(this); return false; }
  }
 }

var objBody = document.getElementsByTagName("body").item(0);
var objOverlay = document.createElement("div");
	objOverlay.setAttribute('id','overlay');
	objOverlay.onclick = function () {hideLightbox(); return false;}
	objOverlay.style.display = 'none';
	objOverlay.style.position = 'absolute';
	objOverlay.style.top = '0';
	objOverlay.style.left = '0';
	objOverlay.style.zIndex = '90';
 	objOverlay.style.width = '100%';
	objBody.insertBefore(objOverlay, objBody.firstChild);
	
var arrayPageSize = getPageSize();
var arrayPageScroll = getPageScroll();
var imgPreloader = new Image();

 imgPreloader.onload=function() {
  var objLoadingImageLink = document.createElement("a");
      objLoadingImageLink.setAttribute('href','#');
	  objLoadingImageLink.onclick = function () { hideLightbox(); return false; }
 
 objOverlay.appendChild(objLoadingImageLink);
 var objLoadingImage = document.createElement("img");
 objLoadingImage.src = loadingImage;
 objLoadingImage.setAttribute('id','loadingImage');
 objLoadingImage.style.position = 'absolute';
 objLoadingImage.style.zIndex = '150';
 objLoadingImageLink.appendChild(objLoadingImage);
 imgPreloader.onload=function(){};
 return false;
}

imgPreloader.src = loadingImage;
 var objLightbox = document.createElement("div");
  objLightbox.setAttribute('id','lightbox');
  objLightbox.style.display = 'none';
  objLightbox.style.position = 'absolute';
  objLightbox.style.zIndex = '100';
  objBody.insertBefore(objLightbox, objOverlay.nextSibling);

 var objLink = document.createElement("a");
  objLink.setAttribute('href','#');
  objLink.setAttribute('title','Clique para fechar');
  objLink.onclick = function () {hideLightbox(); return false;}
  objLightbox.appendChild(objLink);
 
 var imgPreloadCloseButton = new Image();
  imgPreloadCloseButton.onload=function() {
 var objCloseButton = document.createElement("img");
  objCloseButton.src = closeButton;
  objCloseButton.setAttribute('id','closeButton');
  objCloseButton.style.position = 'absolute';
  objCloseButton.style.zIndex = '200';
  objLink.appendChild(objCloseButton);
 return false;
 }

 imgPreloadCloseButton.src = closeButton;
 var objImage = document.createElement("img");
  objImage.setAttribute('id','lightboxImage');
  objLink.appendChild(objImage);

 var objLightboxDetails = document.createElement("div");
  objLightboxDetails.setAttribute('id','lightboxDetails');
  objLightbox.appendChild(objLightboxDetails);

 var objCaption = document.createElement("div");
  objCaption.setAttribute('id','lightboxCaption');
  objCaption.style.display = 'none';
  objLightboxDetails.appendChild(objCaption);

 var objKeyboardMsg = document.createElement("div");
  objKeyboardMsg.setAttribute('id','keyboardMsg');
  objKeyboardMsg.innerHTML = 'Pressione <kbd>X<\/kbd> para fechar';
  objLightboxDetails.appendChild(objKeyboardMsg);
}

function addLoadEvent(func) {
 var oldonload = window.onload;
 if (typeof window.onload != 'function') {
 window.onload = func;
 }
 else {
  window.onload = function() {
   oldonload();
   func();
  }
 }
}

addLoadEvent(initLightbox);

/* x */
var tgs = new Array( 'div','td','tr');
var szs = new Array( 'xx-small','x-small','small','medium','large','x-large','xx-large' );
var startSz = 2;

function ts( trgt,inc ) {
 if (!document.getElementById) return
 var d = document,cEl = null,sz = startSz,i,j,cTags;
 sz += inc;
 if ( sz < 0 ) sz = 0;
 if ( sz > 6 ) sz = 6;
 startSz = sz;
 if ( !( cEl = d.getElementById( trgt ) ) ) cEl = d.getElementsByTagName( trgt )[ 0 ];
 cEl.style.fontSize = szs[ sz ];
 for ( i = 0 ; i < tgs.length ; i++ ) {
  cTags = cEl.getElementsByTagName( tgs[ i ] );
  for ( j = 0 ; j < cTags.length ; j++ ) cTags[ j ].style.fontSize = szs[ sz ];
 }
}