function redimencionar(largura,altura)
{
var adjLarg;
var adjAlt;
var Larg;
var Alt;
var LargDoc;
var AltDoc;
var LargFig;
var AltFig;
	 LargDoc=document.body.offsetWidth; 
	 AltDoc=document.body.offsetHeight; 

	 LargFig=document.images["aa"].width; 
	 AltFig=document.images["aa"].height; 

	 adjLarg = largura / LargFig;
	 adjAlt = altura / AltFig;
	if(adjLarg>adjAlt)
	{
		Larg= adjLarg * LargFig;
		Alt = adjLarg* AltFig;
	}
	else
	{
		Larg= adjAlt * LargFig;
		Alt = adjAlt* AltFig;
	}
	if (LargFig>Larg && Larg>0 && AltFig>Alt && Alt>0) // diminuindo a figura
	{
		document.images["aa"].width=Larg;
		document.images["aa"].height=Alt;
	}
	if (LargFig<Larg)  // aumentando a figura
	{
		//&& (Larg<(LargDoc*0.75)) && (AltFig<Alt && Alt<AltDoc*0.75))
		document.images["aa"].width=Larg;
		document.images["aa"].height=Alt;
	} 
}
function dimencionar(largura,altura)
{
var adjLarg;
var adjAlt;
var Larg;
var Alt;
var LargDoc;
var AltDoc;
var LargFig;
var AltFig;
	 LargDoc=document.body.offsetWidth; 
	 AltDoc=document.body.offsetHeight; 

	 LargFig=document.images["aa"].width; 
	 AltFig=document.images["aa"].height; 

	 adjLarg = largura / LargFig;
	 adjAlt = altura / AltFig;
	if(adjLarg<adjAlt)
	{
		Larg= adjLarg * LargFig;
		Alt = adjLarg* AltFig;
	}
	else
	{
		Larg= adjAlt * LargFig;
		Alt = adjAlt* AltFig;
	}
	document.images["aa"].width=Larg;
	document.images["aa"].height=Alt;
}