function OpenMenu(id){
	menu_obj = document.getElementById(id);
	src_obj = document.getElementById(id +"_src");
	
	if(menu_obj.style.visibility =='hidden' || menu_obj.style.visibility ==''){
		menu_obj.style.visibility = "visible";
	}else{
		menu_obj.style.visibility = "hidden";
	}
	
}