function doShow(direction,lastFrame){
	var curentNo = document.getElementById('curentNo').value;
	if(direction=="forward"){
		var next = parseInt(curentNo)+1;
		var idit = "cadru_"+next;
		if(document.getElementById(idit)==null){
			next = 1;
		}
	} else {
		var next = parseInt(curentNo)-1;
		var idit = "cadru_"+next;
		if(document.getElementById(idit)==null){
			next = lastFrame;
		}
	}
	var idit = "cadru_"+next;
	var idnow = "cadru_"+curentNo;
	document.getElementById(idnow).style.display = "none";
	document.getElementById(idit).style.display = "";
	document.getElementById('curentNo').value = next;
}