function initTabs(blockNr, accommodationType) {
	accommodationType = parseInt(accommodationType);
	if (!accommodationType) accommodationType = 0;
	actTabNr = accommodationType + 1;
	inactTabNr = Math.abs(accommodationType-1) + 1;
	document.getElementById('text_block' + blockNr + '_but' + inactTabNr).className='';
	document.getElementById('text_block' + blockNr + '_tab' + inactTabNr).style.display='none';
	document.getElementById('text_block' + blockNr + '_but' + actTabNr).className='act';
	document.getElementById('text_block' + blockNr + '_tab' + actTabNr).style.display='block';
}