var nLastIndexBlock;
function fIndexesBlock(nBlockID){
	if(nLastIndexBlock){
		document.getElementById("oBlockTab"+ nLastIndexBlock).className="clsTab";
		document.getElementById("oBlockData"+ nLastIndexBlock).style.display="none";
	}
	document.getElementById("oBlockTab"+ nBlockID).className="clsTab_selected";
	document.getElementById("oBlockData"+ nBlockID).style.display="block";
	nLastIndexBlock=nBlockID;
}