var cellIdCurrent='{$cellIdCurrent}',cellIdPrev,cellIdClicked;
function focusCell(_id)
	{
	setClass(_id,'greycell');
	cellIdPrev=_id;
	return 1;
	}
function blurCell(_id)
	{
	if(_id!=cellIdClicked)
		forceBlurCell(_id);
	return 1;
	}
function forceBlurCell(_id)
	{
	setClass(_id,'');
	return 1;
	}