function showLevel(show){
	var ie=navigator.appName.toLowerCase().indexOf("microsoft")>=0;
	var tabela = document.getElementById(show);
	if ( tabela.style.display == "none") {
		document.all.com01.style.display = "none";
		document.all.com02.style.display = "none";
		document.all.com03.style.display = "none";
		document.all.com04.style.display = "none";
		document.all.com05.style.display = "none";
		document.all.com06.style.display = "none";
		document.all.com07.style.display = "none";
		document.all.com08.style.display = "none";
		document.all.com09.style.display = "none";
		tabela.style.display = (ie)? "block" : "table-row";
	} else {
		tabela.style.display = "none";
	}
}