var ancho = 0;
var alto = 0;
function Tamano(){

	ancho=document.body.clientWidth;
	if(document.compatMode=="CSS1Compat")
	{
		alto=document.documentElement.clientHeight;
	}else{
		alto=document.body.clientHeight;
	}

}

function DevolverAncho(){
	return ancho;
}

function DevolverAlto(){
	return alto;
}