if (document.images)
 {
     pic1= new Image();
     pic1.src="images/chapter.gif";
     pic2= new Image();
     pic2.src="images/chapter_open.gif";
 }

var pics= new Array(5)
   pics[0]=pic1.src;
   pics[1]=pic2.src;

var numpics=2;
var thenum=0;
imgName="img1";

function change_it(id)
 {
   if (document.images)
    {
      document.write("<IMG SRC='"+pics[thenum]+"' border='0' name='img"+id+"'>\n");
   }
}

function change_it2(id, plaatje)
 {
         imgName = "img"+id;
         document[imgName].src=pics[plaatje];
 }
 function changeLang()
{
        document.languageform.submit();
}
function refresh()
{
        window.location.reload( false );
}