if (document.images) {
  var pic0 = new Image(); pic0.src = "images/pic0.gif";

  var btn1Off = new Image(); btn1Off.src = "images/b1Off.gif";
  var btn1On  = new Image(); btn1On.src  = "images/b1On.gif";
  var pic1 = new Image(); pic1.src = "images/pic1.gif";

  var btn2Off = new Image(); btn2Off.src = "images/b2Off.gif";
  var btn2On  = new Image(); btn2On.src  = "images/b2On.gif";
  var pic2 = new Image(); pic2.src = "images/pic2.gif";

  var btn3Off = new Image(); btn3Off.src = "images/b3Off.gif";
  var btn3On  = new Image(); btn3On.src  = "images/b3On.gif";
  var pic3 = new Image(); pic3.src = "images/pic3.gif";

  var btn4Off = new Image(); btn4Off.src = "images/b4Off.gif";
  var btn4On  = new Image(); btn4On.src  = "images/b4On.gif";
  var pic4 = new Image(); pic4.src = "images/pic4.gif";

  var btn5Off = new Image(); btn5Off.src = "images/b5Off.gif";
  var btn5On  = new Image(); btn5On.src  = "images/b5On.gif";
  var pic5 = new Image(); pic5.src = "images/pic5.gif";

  var btn6Off = new Image(); btn6Off.src = "images/b6Off.gif";
  var btn6On  = new Image(); btn6On.src  = "images/b6On.gif";
  var pic6 = new Image(); pic6.src = "images/pic6.gif";

  var btn7Off = new Image(); btn7Off.src = "images/b7Off.gif";
  var btn7On  = new Image(); btn7On.src  = "images/b7On.gif";
  var pic7 = new Image(); pic7.src = "images/pic7.gif";
  
  var pic8 = new Image(); pic8.src = "images/pic8.gif";

}

//set a global variable as a flag to hold back the original image by 1 milisecond.
var isMenuAct= false; // the menu is not active yet.

function actMenuItem(img1, img2) {
  isMenuAct = true // the button is active now
  act(img1)
  inact(img2)
}

function inactMenuItem(img1, img2) {
  isMenuAct = false // the button is inactive now
  inact(img1)
  timerID = setTimeout('if (!isMenuAct) act("' + img2 + '")', 250)
}

function act(imgName) {
  if (document.images) 
    document[imgName].src = eval(imgName + 'On.src')
}

function inact(imgName) {
  if (document.images)
    document[imgName].src = eval(imgName + 'Off.src')
}

var i = 0;
function hide_show(id) {
  if (document.layers) {
    if (i == 0) { //contact is hidden
	document.layers[id].visibility="visible"; 
	i = 1; 
    }
    else {
	document.layers[id].visibility="hidden"; 
	i = 0;
    }
  }
  else if (document.all) { 
    if (document.all[id].style.visibility=="hidden") { 
	document.all[id].style.visibility="visible"; 
    }
    else {
	document.all[id].style.visibility="hidden";
    }
  }
}