var subNavVisible = false;
var currentSubNav = 1;
function $(pId) {
	return document.getElementById(pId);
}
function showNav(pId) {
	$('subNav' + currentSubNav).style.display = 'none';
	$('navArrow' + currentSubNav).setAttribute('src', '../files/images/navigationArrow.jpg');
	
	if(subNavVisible == false || currentSubNav != pId) {
		var offsetHeight;
		switch(pId) {
			case 1:
				offsetHeight = 25;
				break;
			case 2:
				offsetHeight = 50;
				break;
			case 3:
				offsetHeight = 50;
				break;
			case 4:
				offsetHeight = 25;
				break;
		}
		
		$('sub_navigation').style.height = offsetHeight + 'px';
		$('subNav' + pId).style.display = 'list-item';
		$('navArrow' + pId).setAttribute('src', '../files/images/navigationArrowActive.jpg');
		subNavVisible = true;
	} else {
		$('sub_navigation').style.height = '5px';
		subNavVisible = false;
	}
	
	currentSubNav = pId;
}
function ajaxReq(pUrl) {
	var httpRequest;
	
	if(window.XMLHttpRequest) {
		httpRequest = new XMLHttpRequest();
		if(httpRequest.overrideMimeType) {
			httpRequest.overrideMimeType('text/xml');
		}
	} else if(window.ActiveXObject) {
		try {
			httpRequest = new ActiveXObject('Msxml2.XMLHTTP');
		} catch (e) {
			try {
				httpRequest = new ActiveXObject('Microsoft.XMLHTTP');
			} catch (e) {
				//gulp!
			}
		}
	}
	
	if(!httpRequest) {
		return false;
	}
	
	httpRequest.onreadystatechange = function() {
		if(httpRequest.readyState == 4) {
			if(httpRequest.status == 200) {
				return httpRequest.responseXML;
			}
		}
	};

	httpRequest.open('GET', pUrl, true);
	httpRequest.send('');
}