if (document.images) {
var Npv_up = new Image(100,50)
Npv_up.src = "pics/buttons/pv_up.gif"
var Nho_up = new Image(100,50)
Nho_up.src = "pics/buttons/ho_up.gif"
var Ndt_up = new Image(100,50)
Ndt_up.src = "pics/buttons/dt_up.gif"
var Ndm_up = new Image(100,50)
Ndm_up.src = "pics/buttons/dm_up.gif"
var Nau_up = new Image(100,50)
Nau_up.src = "pics/buttons/au_up.gif"

var Npv_over = new Image(100,50)
Npv_over.src = "pics/buttons/pv_over.gif"
var Nho_over = new Image(100,50)
Nho_over.src = "pics/buttons/ho_over.gif"
var Ndt_over = new Image(100,50)
Ndt_over.src = "pics/buttons/dt_over.gif"
var Ndm_over = new Image(100,50)
Ndm_over.src = "pics/buttons/dm_over.gif"
var Nau_over = new Image(100,50)
Nau_over.src = "pics/buttons/au_over.gif"

var Npv_down = new Image(100,50)
Npv_down.src = "pics/buttons/pv_down.gif"
var Nho_down = new Image(100,50)
Nho_down.src = "pics/buttons/ho_down.gif"
var Ndt_down = new Image(100,50)
Ndt_down.src = "pics/buttons/dt_down.gif"
var Ndm_down = new Image(100,50)
Ndm_down.src = "pics/buttons/dm_down.gif"
var Nau_down = new Image(100,50)
Nau_down.src = "pics/buttons/au_down.gif"

}

function dm(msgStr) {
  document.returnValue = false;
  if (document.images) { 
     window.status = msgStr;
     document.returnValue = true;
  }
}

function di(id,name){
  if (document.images) document.images[id].src=eval(name+".src");
}