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 newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		nav_Layer_3_over = newImage("images/nav_Layer-3-over.jpg");
		nav_Layer_4_over = newImage("images/nav_Layer-4-over.jpg");
		nav_Layer_5_over = newImage("images/nav_Layer-5-over.jpg");
		nav_Layer_6_over = newImage("images/nav_Layer-6-over.jpg");
		nav_Layer_7_over = newImage("images/nav_Layer-7-over.jpg");
		nav_Layer_8_over = newImage("images/nav_Layer-8-over.jpg");
		nav_Layer_9_over = newImage("images/nav_Layer-9-over.jpg");
		preloadFlag = true;
	}
}