function show_layer(layerID) {
	document.getElementById(layerID).style.visibility = 'visible';
}

function hide_layer(layerID) {
	document.getElementById(layerID).style.visibility = 'hidden';
}

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

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

function findObj(n, d) { 
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=findObj(n,d.layers[i].document);
if(!x && document.getElementById) x=document.getElementById(n); return x;
}

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