function ShowAutors(target)
{
l=(screen.width-500)/2;
t=(screen.height-450)/2;
window.open('autors.php','','top='+t+', left='+l+', resizable=no, scrollbars=no, width=500, height=450');
window.focus;
}

function ShowLog(target)
{
l=(screen.width-600)/2;
t=(screen.height-400)/2;
window.open('log.php','','top='+t+', left='+l+', resizable=no, scrollbars=yes, width=600, height=400');
window.focus;
}