Use a trigger client, basically the same thing as trigger server just backwards
ie.
PHP Code:
function onactionserverside( cmd ) {
switch( cmd ) {
case "test":
triggerclient("gui",this.name,"newb");
break;
}
}
//#CLIENTSIDE
function onactionclientside( cmd ) {
switch( cmd ) {
case "newb":
player.chat = "Not my parking space!";
break;
}
}