function FP_swapImg() {//v1.0
	var doc=document,args=arguments,elm,n; 
	doc.$imgSwaps=new Array(); 
	for(n=2; n<args.length; n+=2) {
		elm=FP_getObjectByID(args[n]); 
		if(elm) { 
			doc.$imgSwaps[doc.$imgSwaps.length]=elm;
	 		elm.$src=elm.src; 
			elm.src=args[n+1]; 
		}
	}
}

function FP_preloadImgs() {//v1.0
	var d=document,a=arguments; 
	if(!d.FP_imgs) d.FP_imgs=new Array();
	for(var i=0; i<a.length; i++) { 
		d.FP_imgs[i]=new Image; 
		d.FP_imgs[i].src=a[i];
	}
}

function FP_getObjectByID(id,o) {//v1.0
	var c,el,els,f,m,n;
	if(!o)o=document;
	if(o.getElementById) 
		el=o.getElementById(id);
	else 
		if(o.layers)
			c=o.layers; 
		else 
			if(o.all) el=o.all[id]; 
	if(el) return el;
	if(o.id==id || o.name==id) return o; 
	if(o.childNodes) c=o.childNodes; 
	if(c)
		for(n=0; n<c.length; n++) { 
			el=FP_getObjectByID(id,c[n]); 
			if(el) return el;
		}
 		f=o.forms; 
		if(f) 
			for(n=0; n<f.length; n++) { 
				els=f[n].elements;
				for(m=0; m<els.length; m++){ 
					el=FP_getObjectByID(id,els[n]); 
					if(el) return el;
				}
			}
	return null;
}

function FP_swapImgRestore() {//v1.0
	var doc=document,i; 
	if(doc.$imgSwaps) { 
		for(i=0;i<doc.$imgSwaps.length;i++) {
			var elm=doc.$imgSwaps[i]; 
			if(elm) { 
				elm.src=elm.$src; 
				elm.$src=null; 
			}
		} 
		doc.$imgSwaps=null;
	}
}



var beingShowedOverlayImage = '';
function showOverlayImage(id){
	if (beingShowedOverlayImage != ''){
		$(beingShowedOverlayImage).hide();
	}
	document.getElementById(id).style.display = "block";
	beingShowedOverlayImage = id;
}
function hideOverlayImage(id){
	document.getElementById(id).style.display = "none";
	beingShowedOverlayImage = '';
}