if (document.layers)
    var doc = 'document.', vis = '.visibility';
if (document.all)
   var doc = 'document.all.', vis = '.style.visibility';

function show(object) {
    if (document.layers || document.all)
        eval(doc + object + vis + ' = "visible"');
}

function hide(object) {
    if (document.layers || document.all)
        eval(doc + object + vis + ' = "hidden"');
}

function hideAll() {
    hide('image1');
    hide('image2');
	hide('image3'); 
    hide('image4');
	hide('image5');
	hide('image6');
}
var showMsg = navigator.userAgent != "Mozilla/4.0 (compatible; MSIE 4.0; MacintoshPPC)";
function dmim(msgStr) {
  document.returnValue = false;
  if (showMsg) { 
    window.status = msgStr;
    document.returnValue = true;
  }
}

var hpm1on = new Image (250, 26);
var hpm2on = new Image (250, 27);
var hpm3on = new Image (250, 43);
var hpm4on = new Image (250, 25);
var hpm5on = new Image (250, 26);
var hpm6on = new Image (250, 25);
var hpm1off = new Image (250, 26);
var hpm2off = new Image (250, 27);
var hpm3off = new Image (250, 43);
var hpm4off = new Image (250, 25);
var hpm5off = new Image (250, 26);
var hpm6off = new Image (250, 25);
var hpmsub1 = new Image (162, 190);
var hpmsub2 = new Image (162, 190);
var hpmsub3 = new Image (162, 190);
var hpmsub4 = new Image (162, 190);
var hpmsub5 = new Image (162, 190);
var hpmsub6 = new Image (162, 190);

function preload_images ()
{
    hpm1on.src = "images/menu/hpm1on.gif";
    hpm2on.src = "images/menu/hpm2on.gif";
    hpm3on.src = "images/menu/hpm3on.gif";
    hpm4on.src = "images/menu/hpm4on.gif";
	hpm5on.src = "images/menu/hpm5on.gif";
	hpm6on.src = "images/menu/hpm6on.gif";	
	hpm1off.src = "images/menu/hpm1off.gif";
    hpm2off.src = "images/menu/hpm2off.gif";
    hpm3off.src = "images/menu/hpm3off.gif";
    hpm4off.src = "images/menu/hpm4off.gif";
	hpm5off.src = "images/menu/hpm5off.gif";
	hpm6off.src = "images/menu/hpm6off.gif"
	hpmsub1.src = "images/menu/hpmsub1on.gif";
	hpmsub2.src = "images/menu/hpmsub2on.gif";
	hpmsub3.src = "images/menu/hpmsub3on.gif";
	hpmsub4.src = "images/menu/hpmsub4on.gif";
	hpmsub5.src = "images/menu/hpmsub5on.gif";
	hpmsub6.src = "images/menu/hpmsub6on.gif";
}

function button1_on() {
	document.hpm1.src = hpm1on.src;
	document.hpm2.src = hpm2off.src;
	document.hpm3.src = hpm3off.src;
	document.hpm4.src = hpm4off.src;
	document.hpm5.src = hpm5off.src;
	document.hpm6.src = hpm6off.src;
	}
function button2_on() {
	document.hpm1.src = hpm1off.src;
	document.hpm2.src = hpm2on.src;
	document.hpm3.src = hpm3off.src;
	document.hpm4.src = hpm4off.src;
	document.hpm5.src = hpm5off.src;
	document.hpm6.src = hpm6off.src;
	}
function button3_on() {
	document.hpm1.src = hpm1off.src;
    document.hpm2.src = hpm2off.src;
	document.hpm3.src = hpm3on.src;
	document.hpm4.src = hpm4off.src;
	document.hpm5.src = hpm5off.src;
	document.hpm6.src = hpm6off.src;	
	}
function button4_on() {
	document.hpm1.src = hpm1off.src;
    document.hpm2.src = hpm2off.src;
	document.hpm3.src = hpm3off.src;
	document.hpm4.src = hpm4on.src;
	document.hpm5.src = hpm5off.src;
	document.hpm6.src = hpm6off.src;	
	}
function button5_on() {
	document.hpm1.src = hpm1off.src;
    document.hpm2.src = hpm2off.src;
	document.hpm3.src = hpm3off.src;
	document.hpm4.src = hpm4off.src;
	document.hpm5.src = hpm5on.src;
	document.hpm6.src = hpm6off.src;
	}
	function button6_on() {
	document.hpm1.src = hpm1off.src;
    document.hpm2.src = hpm2off.src;
	document.hpm3.src = hpm3off.src;
	document.hpm4.src = hpm4off.src;
	document.hpm5.src = hpm5off.src;
	document.hpm6.src = hpm6on.src;
	}