function popup(url, width, height, name){
  pop = window.open(url,name,'width=' + width + ',height=' + height + ',status=yes,resizable=yes,menubar=no,locationbar=no,scrollbars=yes,dependent=yes' );
}
function popup_centered(url, width, height, name)
{
    var sWidth   = screen.width;
    var sHeight  = screen.height;
        
    // Center Popup
    var posX    =  (sWidth/2) - (width/2);
    var posY    =  (sHeight/2) - (height/2);

	pop = window.open(url,name,'width=' + width + ',height=' + height + ',left=' + posX + ',top=' + posY + ',status=no,resizable=yes,menubar=no,locationbar=no,scrollbars=no,dependent=yes' );
}

function popup_resize(width, height) {
    window.resizeTo(width, height);
    // Center Popup
    var sWidth   = screen.width;
    var sHeight  = screen.height;
    var posX    =  (sWidth/2) - (width/2);
    var posY    =  (sHeight/2) - (height/2);
    moveTo(posX,posY);
}