function popup(pag,tit,Wx,Wy,prop) {
posX = screen.width/2;
posX = posX-Wx/2;
Wy = (Wy == 0) ? screen.height-60 : Wy;
//posY = screen.availHeight/2;
//posY = posY-Wx/2;
posY = 0;
winpopup = open(pag, tit, 'width='+Wx+',height='+Wy+',left='+posX+',top='+posY+','+prop);
}
function fullscreen(pag,tit,prop) {
X = screen.availWidth - 10;
Y = screen.availHeight - 100;
winpopup = open(pag, tit, 'width='+X+',height='+Y+',left=0,top=0,'+prop);
}

function nopage() {
popup('popup-nopage.html','nopage',550,330,'toolbars=0');
}