doButton1(){
    llOwnerSay("button 1 pressed");
}

doButton2(){
    llOwnerSay("button 2 pressed");
}

default
{
    state_entry()
    {

    }

    touch_start(integer total_number)
    {
        string primName = llGetLinkName(llDetectedLinkNumber(0));
        if (primName == "button1"){
            doButton1();
        } else if (primName == "button2"){
             doButton2();
        }

    }
}