function opacidade(opt,img,titulo){
if(opt){
	  document.getElementById('exibItem').style.left = "50%";
	  document.getElementById('divOpac').style.left = "0";
	  document.getElementById('mostraImg').innerHTML = "<img src='"+img+"?imgmax=800'>";
	  if (titulo)
	  {
	  	document.getElementById('tituloImagem').innerHTML = titulo;
	  }else
	  	{
			document.getElementById('tituloImagem').innerHTML = "Esta imagem não possui titulo";
			}
	  }else{
			document.getElementById('exibItem').style.left = "-100%";
			document.getElementById('divOpac').style.left = "-100%";
	}
}
function opacidadeMedia(opt,img,titulo){
if(opt){
	  document.getElementById('exibItemMedio').style.left = "50%";
	  document.getElementById('divOpac').style.left = "0";
	  document.getElementById('mostraImgMedia').innerHTML = "<img src='"+img+"'>";
	  if (titulo)
	  {
	  	document.getElementById('tituloImagemMedia').innerHTML = titulo;
	  }else
	  	{
			document.getElementById('tituloImagemMedia').innerHTML = "Esta imagem não possui titulo";
			}
	  }else{
			document.getElementById('exibItemMedio').style.left = "-100%";
			document.getElementById('divOpac').style.left = "-100%";
	}
}
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 = {pageWidth:pageWidth,pageHeight:pageHeight,windowWidth:windowWidth,windowHeight:windowHeight}

		return arrayPageSize;

	}

	

	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 = {yScroll:yScroll};

		return arrayPageScroll;

	}