var newWin;

function popUp(page) {
newWin=window.open(page,"ScienzaPerTutti",'width=640,height=480,left=50,top=50,resizable=yes,toolbar=no,scrollbars=yes');
newWin.focus();
return false;
}

function popUp2(page) {
newWin=window.open(page,"ScienzaPerTutti",'width=750,height=550,left=50,top=50,resizable=no,toolbar=no,scrollbars=auto');
newWin.focus();
return false;
}

function popUpN(page) {
newWin=window.open(page,"ScienzaPerTutti",'width=800,height=600,left=50,top=50,resizable=yes,toolbar=no,scrollbars=yes');
newWin.focus();
return false;
}

function popUnder(page) {
newWin=window.open(page,"ScienzaPerTutti",'width=320,height=480,left=50,top=50,resizable=yes,toolbar=no,scrollbars=yes');
newWin.focus();
return false;
}

function popForse(page) {
 var quale = rndnumber(10);
 if(quale==5){
   popUp2(page);
 }
 return false;
}

function rndnumber(howMany){
 var randscript = -1;
 while (randscript < 0 || randscript > howMany || isNaN(randscript)){
   randscript = parseInt(Math.random()*(howMany+1));
 }
 return randscript;
}

function reOpen(page) {
 location.href=page;
 return false;
}