prontera,155,181,5  script  Sample  757,{
function Exchange;
 
switch( select( "Yggdrasilberry",
                "Royal Jelly",
                "etc..." )){
// Exchange( <Item Gained>,<Amount>,<Item Required>,<Amount> );
Case 1: Exchange( 13517,1,607,100 );    break;
Case 2: Exchange( 13516,5,526,50 ); break;
Case 3: Exchange( 12997,10,757,10 );    break;
default:
    mes "Wrong Selection";  break;
}
close;
 
function    Exchange    {
mes "Exchange "+getarg(3)+" "+getitemname( getarg(2) )+" into "+getarg(1)+" "+getitemname( getarg(0) )+"?";
if( select("Yes:No") == 1 ){
    if( countitem( getarg(2) ) < getarg(3) ){
        mes "Sorry you didnt have enough Items to trade.";
        break;
    }else{
        mes "Done";
        delitem getarg(2),getarg(3);
        getitem getarg(0),getarg(1);
    }
}
return;
}
 
}