How to buy a skill?

[darren]

can someoine tell me how to set an npc up so you can click on a link, the npc will take an item from you, and in return you get a brand new skill on your skill list or another skill in the game.

 

 

let say I want to sell the gm haste skill for an item in the game, when i char buys the skill, it gives it to their skill list, and take the item.

 

 

this is what I would like to do. how do i set this up...please help me if you have idea.

[B1ggBoss]

for a quest script...

public String onAdvEvent(L2Npc npc, L2PcInstance player, String event)
{
String html = event;

if(event.startsWith("buyskill")
{	
	String[] split = event.split("_");
	if(split.lenght < 3)
	{	
		//Handle a warning or something...
		html = "error.htm";
	}
	else
	{	
		int id = 0, lvl = 0;
		try
		{
			id = Integer.parseInt(split[1]);
			lvl = Integer.parseInt(split[2]);
		}
		catch(NumberFormatException nfe)
		{		
			//Handle it
		}
		if(id > 0 && lvl > 0)
		{
			final L2Skill sk = SkillTable.getInstance().getInfo(id, lvl);
			if(sk == null)
				html = "noexist.htm";
			else if(....)
			{
				//Check if the skill exsist into the allowed skills to buy
				//otherwise, player could buy any skill by modding the packet
			}
			else
			{		
				if(player.destroyItemByItemId("SkillBuy", YOUR_ITEM_ID, YOUR_ITEM_AMOUNT, npc, true))
				{
					player.addSkill(sk, true); //true = save to database
					player.sendSkillList();
					html = "buysuccess.htm";
				}
				else
					html = "notenoughitems.htm";
			}
		}
	}
}
return html;

}

[darren]

where do i find this?

[B1ggBoss]

here. I made it to show you how its done. As you can see, its inside a method called onAdvEvent, a method that can be inherited from Quest class that is in charge of parse the quest htmls bypasses