function otvor (theURL,wx,wy) {
mx=Math.round((screen.width-wx)/2);
tab=window.open(theURL,"tab","width="+wx+",height="+wy+",toolbar=no,directories=no,scrollbars=no,location=no,resizable=no,menubar=no,left="+mx+",top=10").focus();
}
function blockError(){return true;}
window.onerror = blockError;