var aPreloads = new Array('about_us', 'practice_areas', 'team', 'resources', 'contact');

function init() {
	preloadImages();
	attachMouseovers();
	var oTerm = null;
	if(oTerm = document.getElementById('txtTerm')) {
		oTerm.onclick = function() {
			if(this.value == this.defaultValue) this.value = '';
		}
		oTerm.onblur = function() {
			if(this.value == '') this.value = this.defaultValue;
		}
	}
}

var sBasePath = "/images/";

if(window.location.href.indexOf('localhost') != -1) sBasePath = '/images/'
if(window.location.href.indexOf('metricmedia') != -1) sBasePath = '/images/'

function preloadImages() {
	var over, out;
	for(var i=0; i<aPreloads.length; i++) {
		out = new Image();
		out.src = sBasePath + 'nav_' + aPreloads[i] + '.gif';
		window['nav_' + aPreloads[i]] = out;

		over = new Image();
		over.src = sBasePath + 'nav_' + aPreloads[i] + '_on.gif';
		window['nav_' + aPreloads[i] + '_on'] = over;
	}
}

function attachMouseovers() {
	var aImgs = document.getElementById('nav').getElementsByTagName('img');
	for(var i=0; i<aImgs.length; i++) {
		if(aImgs[i].src.indexOf('_on.gif') == -1) {
			aImgs[i].onmouseover = swapImage;
			aImgs[i].onmouseout= swapImage;
		}
	}
}

function swapImage() {
	var sImg = this.id.replace(/-/g, '_');
	if(this.src.indexOf('_on.gif') == -1) {
		this.src = eval(sImg + '_on.src');
	} else {
		this.src = eval(sImg + '.src');
	}
}

var newWin = null;
function openWin(url, w, h) {
	var props = "width=" + w + ",height=" + h + ",toolbar=no,menubar=no,personalbar=no,copyhistory=no,scrollbars=yes";
	var handle = "oNewWin";
	if(newWin && !newWin.closed) {
		newWin.focus();
	}
	newWin = window.open(url, handle, props);
}

window.onload = init;


// written by Dean Edwards, 2005
// with input from Tino Zijdel

// http://dean.edwards.name/weblog/2005/10/add-event/

function addEvent(element, type, handler) {
	// assign each event handler a unique ID
	if (!handler.$$guid) handler.$$guid = addEvent.guid++;
	// create a hash table of event types for the element
	if (!element.events) element.events = {};
	// create a hash table of event handlers for each element/event pair
	var handlers = element.events[type];
	if (!handlers) {
		handlers = element.events[type] = {};
		// store the existing event handler (if there is one)
		if (element["on" + type]) {
			handlers[0] = element["on" + type];
		}
	}
	// store the event handler in the hash table
	handlers[handler.$$guid] = handler;
	// assign a global event handler to do all the work
	element["on" + type] = handleEvent;
};
// a counter used to create unique IDs
addEvent.guid = 1;

function removeEvent(element, type, handler) {
	// delete the event handler from the hash table
	if (element.events && element.events[type]) {
		delete element.events[type][handler.$$guid];
	}
};

function handleEvent(event) {
	var returnValue = true;
	// grab the event object (IE uses a global event object)
	event = event || fixEvent(window.event);
	// get a reference to the hash table of event handlers
	var handlers = this.events[event.type];
	// execute each event handler
	for (var i in handlers) {
		this.$$handleEvent = handlers[i];
		if (this.$$handleEvent(event) === false) {
			returnValue = false;
		}
	}
	return returnValue;
};

function fixEvent(event) {
	// add W3C standard event methods
	event.preventDefault = fixEvent.preventDefault;
	event.stopPropagation = fixEvent.stopPropagation;
	return event;
};
fixEvent.preventDefault = function() {
	this.returnValue = false;
};
fixEvent.stopPropagation = function() {
	this.cancelBubble = true;
};