function askMensagem(object, width, height) {
	
	LeftPosition = document.body.clientWidth/2;	
	TopPosition = document.body.clientHeight/2;
	
	divCenterW = width/2;		
	divPosW = (LeftPosition-divCenterW);
	
	divCenterH = height/2;		
	divPosH = (TopPosition-divCenterH);
	
	
	document.getElementById(object).style.marginTop = divPosH+'px';
	document.getElementById(object).style.marginLeft = divPosW+'px';
	
	document.getElementById(object).style.display = 'block';
	scroll(0, 0);
	
}

function unaskMensagem(object) {
	document.getElementById(object).style.display = 'none';
}