function newColor(idCell) {
if (document.all) eval('document.all.'+idCell+'.style.background = "#efefef"');
else eval('document.getElementById("' + idCell + '").style.background = "#efefef"');

}

function backColor(idCell) {
if (document.all) eval('document.all.'+idCell+'.style.background = "#ffffff"');
else eval('document.getElementById("' + idCell + '").style.background = "#ffffff"');
}