function ow_sc(url, w, h, nev)
{
   var leftpos
   var toppos
   w = w + 20;
   h = h + 20;
   leftpos = (screen.availWidth / 2) - (w / 2);
   toppos = (screen.availHeight / 2) - (h / 2);
   popupwindow=window.open(url,nev,'height='+h+',width='+w+',left='+leftpos+',scrollbars=yes,top='+toppos);
   popupwindow.focus();
}

function ow(url, w, h, nev){
   var leftpos
   var toppos
   w = w + 20;
   h = h + 20;
   leftpos = (screen.availWidth / 2) - (w / 2);
   toppos = (screen.availHeight / 2) - (h / 2);
   popupwindow=window.open(url,nev,'height='+h+',width='+w+',left='+leftpos+',scrollbars=no,top='+toppos);
   popupwindow.focus();
}

function ow_sct(url, w, h, nev)
{
   var leftpos
   var toppos
   w = w + 20;
   h = h + 20;
   leftpos = (screen.availWidth / 2) - (w / 2);
   toppos = (screen.availHeight / 2) - (h / 2);
   popupwindow=window.open(url,nev,'height='+h+',width='+w+',left='+leftpos+',scrollbars=yes,toolbar=yes,top='+toppos);
   popupwindow.focus();
}