function colocarPopup(){
	insereFundo();
	
	inserePopFlutuante();
	document.getElementById('bt-fechar-popup').onclick = function()
	{
		removePopUpFlutuante();
		removeFundo();
	}

}

function insereFundo()
{
	
	var div = document.createElement('div');
	div.setAttribute('id', 'div_fundo');
	

	var scrollTop = getScrollY();
	div.style.top = (scrollTop + 140) + 'px';

	document.body.appendChild(div);
}

function inserePopFlutuante()
{
	var div = document.createElement('div');
	div.setAttribute('id', 'div_popupflutuante');
	div.innerHTML  = "<img src='brevemente.png'/></a>";
	div.innerHTML += "<div id='box-img-popupflutuante'><a id='bt-fechar-popup' href='javascript:void(0);' ><img src='bt_fechar_pop.png' border='0'/></a></div>";

	var scrollTop = getScrollY();
	div.style.top = (scrollTop + 140) + 'px';

	document.body.appendChild(div);
}

function removePopUpFlutuante()
{
	idElemento = document.getElementById('div_popupflutuante');
	idElementoPai = idElemento.parentNode;
	idElementoPai.removeChild(idElemento);
}

function removeFundo()
{
	idElemento = document.getElementById('div_fundo');
	idElementoPai = idElemento.parentNode;
	idElementoPai.removeChild(idElemento);
}

function getScrollY()
{
  var scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' ) {
	//Netscape compliant
	scrOfY = window.pageYOffset;
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
	//DOM compliant
	scrOfY = document.body.scrollTop;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
	//IE6 standards compliant mode
	scrOfY = document.documentElement.scrollTop;
  }
  return scrOfY;
}