function addEvent(obj, evType, fn){
	if (obj.addEventListener) {
		obj.addEventListener(evType, fn, false);
		return true;
	}
	else if (obj.attachEvent) {
		var r = obj.attachEvent("on"+evType, fn);
		return r;
	}
	else {
		return false;
	}
}

function versionchanged() {
	if(document.getElementById('version').options[document.getElementById('version').selectedIndex].text == 'ROS') {
		document.getElementById('voidupliftli').style.display = 'none';
	} else {
		document.getElementById('voidupliftli').style.display = 'block';
	}
}

function localauthoritychanged() {
	var i = document.getElementById('localauthority').selectedIndex;
	if(i > 0) {
		document.getElementById('localauthorityregion').innerHTML = laregionlist[i - 1];
	} else {
		document.getElementById('localauthorityregion').innerHTML = 'N/A';
	}
}

function initialiseTenderPrices() {
	if(document.getElementById('version')) {
		addEvent(document.getElementById('version'), 'change', versionchanged);
		addEvent(document.getElementById('localauthority'), 'change', localauthoritychanged);
		versionchanged();
	}
}

addEvent(window, 'load', initialiseTenderPrices);