function preload(imgObj,imgSrc) {
	if (document.images) {
		eval(imgObj + 'on = new Image()')
		eval(imgObj + 'on.src = imgSrc + "_on.gif"')
		eval(imgObj + 'off = new Image()')
		eval(imgObj + 'off.src = imgSrc + "_off.gif"')
	}
}

function img_act(imgName) {
 		imgOn = eval(imgName + "on.src");
        document [imgName].src = imgOn;
}

function img_inact(imgName) {
        imgOff = eval(imgName + "off.src");
        document [imgName].src = imgOff;
}


function changeImage(thelayer,imgName,imgObj) {
	if (document.images) {
		if (document.layers && thelayer!=null) 			
		eval('document.'+thelayer+'.document.images["'+imgName+'"].src = '+imgObj+'.src')
		else document [imgName].src = eval(imgObj+".src")
	}
}

	
function openWindow(windowURL,windowName,windowWidth,windowHeight,x,y,scroll) {
  newWindow = window.open(windowURL,windowName,'width='+windowWidth+',height='+windowHeight+',left='+x+',top='+y+',toolbar=0,location=0,directories=0,status=0,menuBar=0,scrollBars='+scroll+',resizable=0');
  newWindow.focus();
}


if (navigator.appName == "Netscape") {
document.write("<LINK REL=stylesheet HREF=\"css/main_nn.css\" TYPE=\"text/css\">");
} else {
document.write("<LINK REL=stylesheet HREF=\"css/main_ie.css\" TYPE=\"text/css\">"); 
}

if (document.layers) {
  visible = 'show';
  hidden = 'hide';
} else if (document.all) {
  visible = 'visible';
  hidden = 'hidden';
}

function menuItem(item){
  if (document.layers) {
    daLast = document.layers[lastItem];
    daItem = document.layers[item];
  } else if (document.all) {
    daLast = document.all(lastItem).style;
    daItem = document.all(item).style;
  }
  daLast.visibility = hidden;
  daItem.visibility = visible;
  lastItem = item;
}

function menuItem2(item, item2){
  if (document.layers) {
    daLast = document.layers[lastItem];
    daItem = document.layers[item];
    daLast2 = document.layers[lastItem2];
    daItem2 = document.layers[item2];
  } else if (document.all) {
    daLast = document.all(lastItem).style;
    daItem = document.all(item).style;
    daLast2 = document.all(lastItem2).style;
    daItem2 = document.all(item2).style;
  }
  daLast.visibility = hidden;
  daItem.visibility = visible;
  lastItem = item;
  daLast2.visibility = hidden;
  daItem2.visibility = visible;
  lastItem2 = item2;
}