function toogle(total, mudanca, variavel){	
	for(i=1; i<=total; i++){
		executa = "parte" + i + " = document.getElementById(\"bloco" + i + "\")";
		eval (executa);
		executa = "parte" + i + ".style.display = \"none\"";		
		eval (executa);		
	}
	executa = "parte" + mudanca + ".style.display = \"\"";
	eval (executa);
	
	executa = "document.getElementById(\"" + variavel + "\").style.backgroundPosition = \"5px " + (2+(mudanca-1)*20) + "px\"";
	eval(executa);
}