function posicionar(){
 var screen_height = screen.height;
 var screen_width = screen.width;
 
 var ns6 = (!document.all && document.getElementById); 
 var ie4 = (document.all);
 var ns4 = (document.layers);
 var ie6 = (document.documentElement);

 if ( ie4 )floatLayer.style.pixelLeft = (screen_width-(170)-20);
 if ( ns4 )document.floatLayer.left = (screen_width-(170)-20);
 if ( ie6 )document.getElementById('floatLayer').style.left = (screen_width-(170)-20) + "px";
 if ( ns6 ){
	 document.getElementById('floatLayer').style.left = (screen_width-(170)-16) + "px";
	 document.getElementById('floatLayer').style.top = 101 + "px";
 }

}

function tours(pagina)

{

	win=open(pagina,'blank','toolbar=no,directories=no,menubar=no,status=yes,width=460,height=480,top=(screen.height - 450) / 2,left=270,scrollbars=no');

}

function descarga(pagina)

{

	win=open(pagina,'blank','toolbar=no,directories=no,menubar=no,status=yes,resizable=yes');

}