dialog menus!

integer menu_handler;
integer menu_channel;
menu(key user,string title,list buttons)//make dialog easy, pick a channel by itself and destroy it after 5 seconds
{
	menu_channel = (integer)(llFrand(99999.0) * -1);//yup a different channel at each use
	menu_handler = llListen(menu_channel,"","","");
	llDialog(user,title,buttons,menu_channel);
	llSetTimerEvent(5.0);
}

default
{
	touch_start(integer t)
	{
		menu(llDetectedKey(0),"hello world",["yes","no"]);
	}
	timer() //so the menu timeout and close its listener
	{
		llSetTimerEvent(0.0);
		llListenRemove(menu_handler);
	}
	listen(integer channel,string name,key id,string message)
	{
		if (channel == menu_channel) //in case you have others listeners
		{
			llSetTimerEvent(0.0);
			llListenRemove(menu_handler);
			if(message == "yes")
			{
				//do stuffs
			}
			else if(message == "no")
			{
				//do other stuffs
			}
		}
	}
}