Sound when my name is typed

//Little something i banged together, enjoy ^_^
//Written by Strife Onizuka

//Set name to your first name or nickname (if you don't it defaults.
string name = "";
//set sound or it will use the first one it finds in the object inventory.
string sound = "";
float volume = 1.0;

toggle()
{
	if((on = !on))
	{
		w = llListen(0, "", "", "");
		llSetColor(<0.0,1.0,0.0>, ALL_SIDES);
	}
	else
	{
		llListenRemove(w);
		llSetColor(<1.0,0.0,0.0>, ALL_SIDES);
	}
}

integer on;
integer w;

default
{
	state_entry()
	{
		toggle();
		if(sound == "")
			sound = llGetInventoryName(INVENTORY_SOUND, 0);
		if(name == "")
		{
			name = llToLower(llKey2Name(llGetOwner()));
			name = llDeleteSubString(name, llSubStringIndex(name, " "), -1);
		}
	}
	touch_start(integer a)
	{
		toggle();
	}
	listen(integer a, string b, key c, string d)
	{
		if(~llSubStringIndex(llToLower(d), name))
			llPlaySound(sound, volume);
	}
}
//