function setBgColor(where,color) {
 if (color) {where.style.backgroundColor = color; where.style.cursor = 'pointer';}
 else where.style.backgroundColor = '';
}

function powiekszenie(fileName,width,height,scrollbars) {
 if (!width) width = 1007;
 if (!height) height = 707;
 if (!scrollbars) scrollbars = 'no';
 window.open(fileName,'Powiększenie','width='+width+',height='+height+',scrolbars='+scrollbars+',toolbar=no,status=no,menubar=no,top=20,left=20');
}