function show_subnavi(i) {
var j=0;
var el;
while($("#menu" + j).size()==1) {
	$("#menu" + j).css("height","27px");
	if($("#menu" + j).children().size()==2)
		$("#menu" + j + " > div > a").attr("href", "javascript:show_subnavi(" + j + ")");
	j++;
}
if(i!=-1) {
	$("#menu" + i).css("height","auto");
	$("#menu" + i + " > div > a").attr("href", "javascript:show_subnavi(-1)");
}
}