// ATTACH EVENT HANDLERS
/* override onload */
addEvent(window, 'load', function() {
 		doStandardsCompliantExternalLinks();
		enableClearDefault();
		//labelTrick();// requires labeltrick.js
	}
); 

// useful event scripts below 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;
};

/* Clear Default values and select all in form fields - Copyleft 2006 HarvestDigital.com */
/* written by Mark Rochefort and released under a "Share-and-Share Alike" loose public license. */

function enableClearDefault() {
	if (!document.getElementsByTagName) return;
	var inputFields = document.getElementsByTagName("input");
	for (var i=0; i<inputFields.length; i++) {
		var inputField = inputFields[i];
		if (inputField.type=="text") {
			addEvent(inputFields[i], 'focus', 
				function() {
					clearDefault(this);
				}
			);
		}
	}
}


function clearDefault(el) {
	if ((el.defaultValue==el.value) && (isNaN(el.value))) {
		el.value = "";
	} else {
		el.select();
	}
}

/* External links JavaScript - Copyleft 2005 HarvestDigital.com */
/* Released under a "Share-and-Share Alike" loose public license. */
/* This code was inspired by several examples, and may be reproduced and reused freely as long as the same rights are passed on in full. */
/* Examples that inspired this code: */
/* http://www.sitepoint.com/article/standards-compliant-world */
/* http://development.incutio.com/simon/targetBlankExperiment.html */

function doStandardsCompliantExternalLinks() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++) {
		var anchor = anchors[i];
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external") {// for example: title="Download Adobe Reader" rel="external"
			anchor.target = "_blank";
			anchor.title += " - Opens in new window ("+anchor.getAttribute("href")+")";
		}
	}
}

function showText(text, displayObjID) {
	var displayObj = document.getElementById(displayObjID);
	displayObj.innerHTML = '<h3>'+text+'</h3>';
	window.status = text;
}