// Get the HTTP Object
function getHTTPObject(){
	if (window.ActiveXObject) {
		return new ActiveXObject("Microsoft.XMLHTTP");
	} else if (window.XMLHttpRequest) {
		return new XMLHttpRequest();
	} else {
		alert("Your browser does not support AJAX.");
		return null;
	}
}

// Show hidden layer/form
function show_hidden(current_layer, focusField) { 
	document.getElementById(current_layer).style.visibility='visible';
	if (focusField) 
		document.getElementById(focusField).focus();
}

// close and reset current layer/form and reset variable
function close_reinit(formName, currentLayer, outputLayer) {
	document.getElementById(outputLayer).innerHTML = ' ';
	document.getElementById(formName).style.display = '';
	document.getElementById(currentLayer).style.visibility='hidden';
}