function openWindow(url,name,width,height,scroll){
	var win;
	win = window.open('' + url + '','' + name + '','width=' + width + ',height=' + height + ',scrollbars=' + scroll + ',resizable=1,status=1,menubar=0');
}

function fullsize(img_name)
{
	var browser=navigator.appName;
	if(browser == 'Netscape' || browser == 'Microsoft Internet Explorer')
	{
		myLightbox.start('images/' + img_name);
	} else {
		openWindow('image_viewer.asp?filename=' + img_name,'image_viewer','900','650',1);
	}
}

function closer_look(img_name)
{
	openWindow('zoom/closer_look.asp?filename=' + img_name,'image_viewer','800','500',1);
}

function createRequestObject() 
{
	var req;
	
	if(window.XMLHttpRequest)
	{
		req = new XMLHttpRequest();
	} else if(window.ActiveXObject) {
		req = new ActiveXObject("Microsoft.XMLHTTP");
	} else {
		alert('There was a problem. You will be unable to use this website. Please upgrade to a modern browser.');
	}
	
	return req;

}

var http_r = createRequestObject();

function chm_r(map_location) 
{
  http_r.open('get', '_content/' + map_location);
  http_r.onreadystatechange = chm_hr;
  http_r.send(null);
}

function chm_r_image_captions(map_location,i) 
{
  http_r.open('get', '_content/' + map_location + '_caption_' + i + '.asp');
  http_r.onreadystatechange = chm_hr_image_captions;
  http_r.send(null);
}

function chm_hr_image_captions() 
{
		if(http_r.readyState == 4 && http_r.status == 200)
		{
			var response = http_r.responseText;
			
			if(response) 
			{
					document.getElementById("caption_details").innerHTML = response;
			}
		}
}

function chm_hr() 
{
		if(http_r.readyState == 4 && http_r.status == 200)
		{
			var response = http_r.responseText;
			
			if(response) 
			{
					document.getElementById("response").innerHTML = response;
			}
		}
}

function navOver(arg1,arg2)
{
	if(document.images)
	{
		document[arg1].src = eval(arg2 + ".src");
	}
}
	
if (document.images)
{
			nav1_on = new Image();
			nav1_on.src = "images/nav1_on.gif";

			nav1_off = new Image();
			nav1_off.src = "images/nav1_off.gif";
			
			nav2_on = new Image();
			nav2_on.src = "images/nav2_on.gif";

			nav2_off = new Image();
			nav2_off.src = "images/nav2_off.gif";
			
			nav3_on = new Image();
			nav3_on.src = "images/nav3_on.gif";

			nav3_off = new Image();
			nav3_off.src = "images/nav3_off.gif";
			
			nav4_on = new Image();
			nav4_on.src = "images/nav4_on.gif";

			nav4_off = new Image();
			nav4_off.src = "images/nav4_off.gif";
			
			nav5_on = new Image();
			nav5_on.src = "images/nav5_on.gif";

			nav5_off = new Image();
			nav5_off.src = "images/nav5_off.gif";					
}