var Type = 'Z';
function StartFloat(eldiv) {
	var ancho;
	var ancho_banner = 200;
	if(document.all) {
		ancho = document.body.clientWidth - ancho_banner;
		Type = 'A';
	} else if(document.getElementById) {
		ancho = (window.innerWidth - ancho_banner) + 'px';
		Type = 'C';
	}
	document.getElementById(eldiv).style.left = ancho;
	document.getElementById(eldiv).style.visibility = 'visible';
	if (document.all) { 
		window.onscroll = Float; 
	} else { 
		setInterval('Float()', 100); 
	}
}

function Float() {
	if (Type == 'A') { 
		document.all['rasca'].style.pixelTop = document.documentElement.scrollTop; 
	} else if (Type == 'C') { 
		document.getElementById('rasca').style.top = window.pageYOffset + 'px'; 
	}
}