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){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}
	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
}

var timer;

function bodyOverlay(TextoAMostrar,idd,iddx) {
	  var objBody = document.getElementsByTagName('body').item(0);
	  var sizesPage = getPageSize();
	  var bodyOverlay = document.createElement("div");
	  bodyOverlay.setAttribute('id','bodyOverlay');
	  bodyOverlay.style.height = 400 + arrayPageSize[1] + 'px'; // fundo com o tamanho total da página.
	  if (!document.getElementById('bodyOverlay')) {
		    objBody.insertBefore(bodyOverlay, objBody.firstChild);
	  }
	  /**
	   * Acrescentei isto aqui apenas para chamar a função removerOverlay
	   */
  document.getElementById(idd).src=TextoAMostrar
  document.getElementById(idd).style.display = 'block';
  document.getElementById(iddx).style.display = 'block';
	timer = window.setInterval('removerOverlay(idd)',360000);
}

function removerOverlay(idd,idds,iddx) {

	 clearInterval(timer);
	 OcultarDesc(idd,idds,iddx);
	 
	  var bodyOverlay = document.getElementById('bodyOverlay');
	  if (bodyOverlay) {
		    bodyOverlay.parentNode.removeChild(bodyOverlay);
	  }
}

function MostrarDesc(TextoAMostrar,idd){
  document.getElementById(idd).src=TextoAMostrar
  document.getElementById(idd).style.display = 'block';
}
function OverDesc(idd){
  document.getElementById(idd).style.display = 'none';
  document.getElementById(idd).src=''
}
function OcultarDesc(idd,idds,iddx){
  document.getElementById(idd).style.display = 'none';
  document.getElementById(idd).src=''
  document.getElementById(idds).style.display = 'none';
  document.getElementById(idds).src=''
  document.getElementById(iddx).style.display = 'none';
}