function PosicionarTransparencia(oDiv, oBkg, oTxt) {
	var oDivTransp = document.getElementById(oDiv);
	var oBkgTransp = document.getElementById(oBkg);
	var oTxtTransp = document.getElementById(oTxt);

 	oBkgTransp.style.height= oTxtTransp.offsetHeight + 'px';
 	oBkgTransp.style.top = oDivTransp.offsetHeight - oTxtTransp.offsetHeight + 'px';
 	oTxtTransp.style.top = oDivTransp.offsetHeight - oTxtTransp.offsetHeight - oBkgTransp.offsetHeight +'px';
 }