function alertContents() {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			//alert(http_request.responseText);
			result = http_request.responseText;
			document.getElementById('htmlHelpContents').innerHTML = result;            
		} else {
			alert(http_request.status+': There was a problem with the request.');
		}
	}
}

function makeGETRequest(url) {
	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			// set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request) {
		alert('Cannot create XMLHTTP instance');
		return false;
	}
	
	http_request.onreadystatechange = alertContents;
	http_request.open("GET", url, true);
	http_request.send(null);
}

function makePOSTRequest(url, parameters) {
	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			// set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request) {
		alert('Cannot create XMLHTTP instance');
		return false;
	}

	http_request.onreadystatechange = alertContents;
	http_request.open('POST', url, true);
	http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http_request.setRequestHeader("Content-length", parameters.length);
	http_request.setRequestHeader("Connection", "close");
	http_request.send(parameters);
}

function trackThis() {
	//var resultDiv = window.frames.hiddenFrame.document.getElementById('result');
	document.getElementById('uploadLayers').innerHTML = window.frames.hiddenFrame.innerHTML;
	//uploadedImage.src = resultDiv.innerHTML; 
	//uploadedImage.style.display="block";
	alert("File Uploaded :" + resultDiv.innerHTML);
}

function uploadThisLayer(dlForm){
	if((!dlForm.newLayer.value)||(!dlForm.newLayerName.value)){
		alert("Both a file and layer name must be entered!");
		return(false);
	}
	var poststr = "newLayer=" + encodeURI( document.getElementById("newLayer").value ) +
				  "&newLayerName=" + encodeURI( document.getElementById("newLayerName").value );
	makePOSTRequest('manageLayers.html', poststr);
}

function deleteThisLayer(dlForm){
	if(!dlForm.userLayers.value){
		alert("No layer selected to delete!");
		return(false);
	}
	if(confirm("Are you sure you want to delete this layer?")){
		//dlForm.submit();
		var getstr = "?userLayers=" + encodeURI( document.getElementById("userLayers").value );
		//makePOSTRequest('manageLayers.html', poststr);
		frames['hiddenFrame'].location.href = 'manageLayersPost.html'+getstr;
	}
}