//dynamicShadow - Creates a dynamic shadow for images
//Defaults to shadow.gif, 10 width, no offset
//Note: Prototype Framework
function dynamicShadow(shadowURL, containerID, shadowWidth, shadowOffset) {
	var shadowURL = (shadowURL == null) ? "../images/global/shadowTest.gif" : shadowURL;
	var containerID = (containerID == null) ? "page-container" : containerID;
	var shadowWidth = (shadowWidth == null) ? 10 : shadowWidth;
	var shadowOffset = (shadowOffset == null) ? 0 : shadowOffset;

	
	var images = $$(
		'#' + containerID + ' img.shadow,'
		+ '#' + containerID + ' img.shadowLeft,'
		+ '#' + containerID + ' img.shadowRight,'
		+ '#' + containerID + ' img.shadowCenter');
	var imageClone;
	var imageHeight;
	var imageWidth;
	var shadowContainer;
	var shadowDiv = [];
	
	images.each(function(imageObject){
		imageClone = Object.extend(imageObject);
		imageHeight = imageObject.getHeight();
		imageWidth = imageObject.getWidth();
		imageClass = imageObject.className;
		
		// Create the Shadow Container
		shadowContainer = new Element('div');
		shadowContainer.addClassName('shadowContainer');
		shadowContainer.addClassName(imageClass);
		shadowContainer.setStyle({
			position: 'relative',
			padding: shadowWidth + 'px',
			width: imageWidth + 'px',
			height: imageHeight + 'px',
			background: 'transparent'
		});

		// Create Top Left Div
		shadowDiv[0] = new Element('div');
		shadowDiv[0].setStyle({
			position: 'absolute',
			top: 0,
			left: 0,
			width: shadowWidth + 'px',
			height: shadowWidth + 'px',
			background: 'transparent url("' + shadowURL + '") top left no-repeat'
		});
		shadowContainer.insert({ bottom: shadowDiv[0] });
		
		// Create Top Right Div
		shadowDiv[1] = new Element('div');
		shadowDiv[1].setStyle({
			position: 'absolute',
			top: 0,
			right: 0,
			width: shadowWidth + 'px',
			height: shadowWidth + 'px',
			background: 'transparent url("' + shadowURL + '") top right no-repeat'
		});
		shadowContainer.insert({ bottom: shadowDiv[1] });
		
		// Create Bottom Right Div
		shadowDiv[2] = new Element('div');
		shadowDiv[2].setStyle({
			position: 'absolute',
			bottom: 0,
			right: 0,
			width: shadowWidth + 'px',
			height: shadowWidth + 'px',
			background: 'transparent url("' + shadowURL + '") bottom right no-repeat'
		});
		shadowContainer.insert({ bottom: shadowDiv[2] });
		
		// Create Bottom Left Div
		shadowDiv[3] = new Element('div');
		shadowDiv[3].setStyle({
			position: 'absolute',
			bottom: 0,
			left: 0,
			width: shadowWidth + 'px',
			height: shadowWidth + 'px',
			background: 'transparent url("' + shadowURL + '") bottom left no-repeat'
		});
		shadowContainer.insert({ bottom: shadowDiv[3] });
		
		// Create Center Top Div
		shadowDiv[4] = new Element('div');
		shadowDiv[4].setStyle({
			position: 'absolute',
			top: 0,
			left: shadowWidth + 'px',
			width: imageWidth + 'px',
			height: shadowWidth + 'px',
			background: 'transparent url("' + shadowURL + '") top center no-repeat'
		});
		shadowContainer.insert({ bottom: shadowDiv[4] });
		
		// Create Center Right Div
		shadowDiv[5] = new Element('div');
		shadowDiv[5].setStyle({
			position: 'absolute',
			top: shadowWidth + 'px',
			right: 0,
			width: shadowWidth + 'px',
			height: imageHeight + 'px',
			background: 'transparent url("' + shadowURL + '") center right no-repeat'
		});
		shadowContainer.insert({ bottom: shadowDiv[5] });
		
		// Create Center Bottom Div
		shadowDiv[6] = new Element('div');
		shadowDiv[6].setStyle({
			position: 'absolute',
			bottom: 0,
			right: shadowWidth + 'px',
			width: imageWidth + 'px',
			height: shadowWidth + 'px',
			background: 'transparent url("' + shadowURL + '") bottom center no-repeat'
		});
		shadowContainer.insert({ bottom: shadowDiv[6] });
		
		// Create Center Right Div
		shadowDiv[7] = new Element('div');
		shadowDiv[7].setStyle({
			position: 'absolute',
			top: shadowWidth + 'px',
			left: 0,
			width: shadowWidth + 'px',
			height: imageHeight + 'px',
			background: 'transparent url("' + shadowURL + '") center left no-repeat'
		});
		shadowContainer.insert({ bottom: shadowDiv[7] });
		
		imageObject.replace(shadowContainer);
		
		shadowContainer.insert({ bottom: imageClone });
		
	});
	
	return false;
}

//First and Last LI Selector
//Note: Prototype Driven
function liFirstLast() {
	var firstLIs =	$$('ul > li:first-child');
	var lastLIs = $$('ul > li:last-child');
	
	firstLIs.each(function(liFirst) {
		liFirst.addClassName('first');
		});
		
	lastLIs.each(function(liLast) {
		liLast.addClassName('last');
	});
}

//Height Balance
//Normalizes the height of the elements passed in,
//based on the number of columns desired
function heightBalance(balanceElements, columns){
	balanceElements.eachSlice(columns, function(balanceElementSlice){
		var sliceHeight = balanceElementSlice.max(function(sliceElement){
			return sliceElement.getHeight();
		});
		
		balanceElementSlice.each(function(balanceElement){
			balanceElement.setStyle({
				height: sliceHeight + 'px'
			});
		});
	});
}


//Highlight Height Matching
function highlightMatchHeight(){
	var highlights = $$('div.highlight');
	
	if(!highlights[0]) return false;
	
	heightBalance(highlights, 3);
	
	//We need to change up the styling on the last highlight.
	var lastHighlights = $$('div.highlight:last-child');
		
	lastHighlights.each(function(lastHighlight) {
		lastHighlight.addClassName('last');
	});
	
	//We need to change up the styling on the first highlight.
	var firstHighlights = $$('div.highlight:first-child');
		
	firstHighlights.each(function(firstHighlight) {
		firstHighlight.addClassName('first');
	});
}

//Footer Padding Corrector
//Adjust the footer padding for the browser size
function positionElements() {
	var docFooter = $('footer');
	
	var viewportDimensions = document.viewport.getDimensions();
	
	docFooter.setStyle({
		padding: '0 ' + (viewportDimensions.width - 932)/2 + 'px',
		width: viewportDimensions.width - (viewportDimensions.width - 932) + 'px'
	});

}


//External Link Helper
//Updates Links with External Relation to
//use target="_blank"
function externalLinks(){
	var links = $$('a[rel=external]');
	
	links.each(function(externalLink){
		externalLink.writeAttribute('target', '_blank');
	});
}

//Input Clear
//Clears text inputs on a page on focus
//Note: Prototype driven
function inputClear() {
	var textInputs = $$('input[type="text"]');
	
	textInputs.each(function(textInput){
		textInput.initialValue = textInput.value;
		textInput.observe('focus', function(event) {
			if(textInput.value == textInput.initialValue){
				textInput.clear();
			}
		});
		textInput.observe('blur', function(event){
			if(textInput.value.blank() == true) {
				textInput.value = textInput.initialValue;
			}
		});
	});
}

// Cookie Functions
// Set the cookie 
function setCookie(name, value, expires, path, domain, secure) {
	// set time, it's in milliseconds
	var today = new Date();
	today.setTime( today.getTime() );
	
	/*
	if the expires variable is set, make the correct
	expires time, the current script below will set
	it for x number of days, to make it for hours,
	delete * 24, for minutes, delete * 60 * 24
	*/
	if ( expires )
	{
	expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );
	
	document.cookie = name + "=" +escape( value ) +
	( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
	( ( path ) ? ";path=" + path : "" ) +
	( ( domain ) ? ";domain=" + domain : "" ) +
	( ( secure ) ? ";secure" : "" );
}

// Read the cookie 
function readCookie(name) { 
	var needle = name + "="; 
	var cookieArray = document.cookie.split(';'); 
	for(var i=0;i < cookieArray.length;i++) { 
		var pair = cookieArray[i]; 
		while (pair.charAt(0)==' ') { 
			pair = pair.substring(1, pair.length); 
		} 
		if (pair.indexOf(needle) == 0) { 
			return pair.substring(needle.length, pair.length); 
		} 
	} 
	return null; 
}




//Replacement for Window Onload - Loads before images, cross-browser
document.observe("dom:loaded", function() {
	//dynamicShadow('/images/global/shadow.png', 'page-container', 16, 0);
	liFirstLast(); // Adds classes 'first' and 'last' to respective LIs
	highlightMatchHeight();
	positionElements();
	    Event.observe(document.onresize ? document : window, "resize", function() {
        positionElements();
    });
});