//Rollover image script

if (document.images) {
  image1on = new Image();
  image1on.src = "images/nav_home_1.gif";

  image2on = new Image();
  image2on.src = "images/nav_about_1.gif";
  
  image3on = new Image();
  image3on.src = "images/nav_exhibit_1.gif";
  
  image4on = new Image();
  image4on.src = "images/nav_collect_1.gif";  
  
  image5on = new Image();
  image5on.src = "images/nav_shop_1.gif";    
    
  image6on = new Image();
  image6on.src = "images/nav_contact_1.gif";

  image1off = new Image();
  image1off.src = "images/nav_home_0.gif";

  image2off = new Image();
  image2off.src = "images/nav_about_0.gif";
  
  image3off = new Image();
  image3off.src = "images/nav_exhibit_0.gif";
  
  image4off = new Image();
  image4off.src = "images/nav_collect_0.gif";
  
  image5off = new Image();
  image5off.src = "images/nav_shop_0.gif";
    
  image6off = new Image();
  image6off.src = "images/nav_contact_0.gif";   
     
}

function turnOn(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "on.src");
  }
}

function turnOff(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "off.src");
  }
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}