var defaultText = "<div class='defaulttext'>Click on a county on the map to the right to find places for walking.</div>";   

//////////////////////////
function retrieveMapAreaText(areaid) {
	var xmlHttp;
	try {
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch (e) {
		// Internet Explorer
		try {
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) {
			try {
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e) {
				alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}
	xmlHttp.onreadystatechange=function() {
		if(xmlHttp.readyState==4) {
			load_swaptext(xmlHttp.responseText);
		}
    }
	var serverScriptCall = "http://www.letsgowalkinms.com/countyMap/cms/countymap.php?inst=0&action=display&areaid=" + areaid; 
    xmlHttp.open("GET",serverScriptCall,true);
    xmlHttp.send(null);
 } // retrieveMapAreaText


//////////////////////////
function process_maparea_change(eventobject) {
	var areaid = "";
	try {
			areaid = event.srcElement.id;
		}
		catch (err) {
			try {
				areaid = eventobject.target.id;
			}
			catch (err) {
			}
		}
		retrieveMapAreaText(areaid);
		var origAreaID = areaid;
		var areaIDFileStr = origAreaID.replace(" ", "_");
		mapimageelement = document.getElementById('mapimage');
		mapimageelement.src = "http://www.letsgowalkinms.com/countyMap/public/images/ms_map_" + areaIDFileStr + ".jpg";
} // process_maparea_change

//////////////////////////
function load_swaptext(textcontent) {
	element = document.getElementById('swaptext');
	element.innerHTML = textcontent;   
	
} // load_swaptext

//////////////////////////
function display_default() {

	element = document.getElementById('swaptext');
	element.innerHTML = defaultText;   
	
} // display_default