var temp='';
function show_hide(id) {
symbol=document.getElementById(id);
state=symbol.style.display;
if ((state=='none') || (state=='') ) {
if (temp!='') {
document.getElementById(temp).style.display='none';
}
symbol.style.display='block';
temp=id;
}       
else {
symbol.style.display='none';
}
}

function pop(URL,nome,winWidth,winHeight,winLeft,winTop,SB,RSZ) {
if (winLeft < 0)
winLeft = screen.width - winWidth + winLeft
if (winTop < 0)
winTop = screen.height - winHeight + winTop
if (winTop == "cen")
winTop = (screen.height - winHeight)/2 - 20
if (winLeft == "cen")
winLeft = (screen.width - winWidth)/2
if (winLeft>0 & winTop>0)
window.open(URL, nome, 'width='+winWidth+',height='+winHeight+',fullscreen=no,toolbar=no,status=no,menubar=no,scrollbars='+SB+',resizable='+RSZ+',directories=no,location=no,left='+winLeft+',top='+winTop+',screenX='+winLeft+',screenY='+winTop);
}