function lebegobe (pont) {
if (!document.getElementById) return;
//setTimeout ("document.getElementById('" + pont + "').style.visibility = 'visible'",400);
setTimeout ("document.getElementById('" + pont + "').style.display = 'block'",400);
}

function lebegoki (pont) {
if (!document.getElementById) return;
//setTimeout ("document.getElementById('" + pont + "').style.visibility = 'hidden'",400);
setTimeout ("document.getElementById('" + pont + "').style.display = 'none'",400);
}

function ablak (url,nev,w,h,scroll){
LeftPosition=(screen.width)?(screen.width-w)/2:0;
TopPosition=(screen.height)?(screen.height-h)/2:0;
settings='height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable';
new_window=window.open(url,nev,settings)
}