function showLayer(id){
	if (navigator.userAgent.indexOf("Opera")!=-1 && document.getElementById) type="OP";
	if (document.all) type="IE";
	if (document.layers) type="NN";
	if (!document.all && document.getElementById) type="MO";

	if (type=="IE") {
		if (eval("document.all." + id + ".style.display") == "none")
			eval("document.all." + id + ".style.display='block'");
		else
			eval("document.all." + id + ".style.display='none'");
	}
	if (type=="NN") {
		if (eval("document." + id + ".display") == "none")
			eval("document." + id + ".display='block'");
		else
			eval("document." + id + ".display='none'");

	}
	if (type=="MO" || type=="OP") {
		if (eval("document.getElementById('" + id + "').style.display") == "none")
			eval("document.getElementById('" + id + "').style.display='block'");
		else
			eval("document.getElementById('" + id + "').style.display='none'");

	}
}