function navi_over(id){
	document.getElementById("dropmenu_"+id).style.display = "block";
	document.getElementById("navi_"+id).style.backgroundPosition = "right bottom";
	document.getElementById("span_"+id).style.backgroundPosition = "left bottom";
	document.getElementById("span_"+id).style.color = "#000000";
}
function navi_out(id){
	document.getElementById("dropmenu_"+id).style.display = "none";
	document.getElementById("navi_"+id).style.backgroundPosition = "right top";
	document.getElementById("span_"+id).style.backgroundPosition = "left top";
	document.getElementById("span_"+id).style.color = "#FFFFFF";
}