function popup(Url, Titulo, Width, Height) {
    window.open(Url, Titulo, 'width='+Width+', height='+Height+', scrollbars=no, status=no, top='+((screen.availHeight/2)-(Height/2))+', left='+((screen.availWidth/2)-(Width/2)), 'alwaysRaised');
}

function resize(w,h) {  
	window.resizeTo(w+8, h-20);
}
function pop2(Url, Titulo, Width, Height) {
    window.open(Url, Titulo, 'width='+Width+', height='+Height+', scrollbars=yes, status=no, top='+((screen.availHeight/2)-(Height/2))+', left='+((screen.availWidth/2)-(Width/2)), 'alwaysRaised');
}