//thanks to Jeremy Keith for his excellent book Dom Scripting and for his excellent functions below


function prepareGallery(){
	if(!document.getElementsByTagName) return false;
	if(!document.getElementById) return false;
	if(!document.getElementById("satimg_lists")) return false;
	var imagerywrap = document.getElementById("satimg_lists");
	var satimglinks = imagerywrap.getElementsByTagName("a");
	var imagery = document.getElementById("imagery");
	var imagerylinks = imagery.getElementsByTagName("a");
	for (var i=0;i<imagerylinks.length;i++){
		imagerylinks[i].onclick = function(){
			return popUpSat(this);
		}
	}
	for (var i=0;i<satimglinks.length; i++){
		satimglinks[i].onclick = function(){
		return showPic(this);
		}		
	}
	
}

function showPic(whichpic){
	if (!document.getElementById("satimg")) return true;
	var source = whichpic.getAttribute("href");
	var title = whichpic.getAttribute("title");
	var alt = whichpic.getAttribute("title");
	var satimg = document.getElementById("satimg");
	var imagery = document.getElementById("imagery");
	var imagerylinks = imagery.getElementsByTagName("a");
	for (var i=0;i<imagerylinks.length;i++){
		imagerylinks[i].setAttribute("href", source);
		imagerylinks[i].setAttribute("title", title);
		imagerylinks[i].onclick = function(){
			return popUpSat(this);
		}
	}
	satimg.setAttribute("src", source);
	satimg.setAttribute("alt", alt);
	satimg.setAttribute("title", title);
	return false;
}


function popUpSat(whichlink){
	var source = whichlink.getAttribute("href");
	var title = whichlink.getAttribute("title");
	window.open(source, '_blank', "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,copyhistory=0,width=720,height=500");
	return false;
}

addLoadEvent(prepareGallery);