var x,y;
if (self.innerHeight) // all except Explorer
{
	x = self.innerWidth;
	y = self.innerHeight;
}
else if (document.documentElement && document.documentElement.clientHeight)
	// Explorer 6 Strict Mode
{
	x = document.documentElement.clientWidth;
	y = document.documentElement.clientHeight;
}

if (x<866) {
	document.write('<style type="text/css">#esquinas {display: none; } #wrapper {margin-top: 0;} body {background: url(img/body-fondo-800.gif) repeat-x; }</style>'); 
	/*document.getElementById('esquinas').style.display = 'none';
	document.getElementById('wrapper').style.marginTop = '0';
	document.getElementsByTagName('body')[0].style.background = 'none';
	document.getElementsByTagName('body')[0].style.background = 'url(img/body-fondo-800.gif) repeat-x';
	*/
}
if(document.getElementById('ingresarBtn')) {
	if(y>542) {
		document.getElementById('pie').style.position = 'absolute';
		document.getElementById('pie').style.bottom = '0';
		document.getElementById('pie').style.left = '0';
	}
}