// JavaScript Document



function frm_up_qty(frm){

  old_qty = parseInt(frm.how_many.value);

  frm.how_many.value = old_qty + 1;

  return;

}

function frm_down_qty(frm){

  old_qty = parseInt(frm.how_many.value);

    if( old_qty > 1 ){

      frm.how_many.value = old_qty - 1;

    }	

  return;

}



function frm_up_qty_multi(frm){

  old_qty = parseInt(frm.value);

  frm.value = old_qty + 1;

  return;

}

function frm_down_qty_multi(frm){

  old_qty = parseInt(frm.value);

    if( old_qty >= 1 ){

      frm.value = old_qty - 1;

    }	

  return;

}