var oldSrc;

function preloadimages() {
	/*
	pre-load a highlighted version 
	of each "nav_" image
	*/
	var num = document.images.length;
	var img,posn,temp,orig,newsrc;
	var preload = new Array();
	for(var i = 0; i<num; i++) {
		img = document.images[i].src;
		posn = img.indexOf("left_nav");
		if(posn > -1 && img.indexOf("_lit")< 0){
			dot = img.lastIndexOf(".");
			temp = img.substr(dot,img.length);
			orig = img.substr(0,dot);
			newsrc = orig + "_lit" + temp;
			preload[i] = new Image();
			preload[i].src = newsrc;
		}//if
	}//for
 }

function getSrc(n){
    img = n.toString();
         eval("n = document." + img + ".src");
         if(n.indexOf("_lit")< 0){
                 dot = n.lastIndexOf(".");
                 temp = n.substr(dot,n.length).toString();
                 orig = n.substr(0,dot).toString();
                 newsrc = orig + "_lit" + temp;
                 newsrc = newsrc.toString();
         return newsrc;
         }
        else{return n;}
 }

function swap(imgname) {
       n = arguments[0].toString();
                  eval("oldSrc = document." + n + ".src");
                  old = n;
                  eval("document." + n + ".src=getSrc('" + imgname + "')");
 }

function restore(){
      eval("document." + img + ".src=oldSrc");

 }

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];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}