/**
 * Browser Functions
 * 
 * @name Browser
 * @author cjoudrey
 * @package reptiletech
 */

var Browser = {
	
	onLoad: [],
	
	redirect: function(url)
	{
		document.location = url;
	},
	
	registerOnLoad: function(callback)
	{
		Browser.onLoad.push(callback);
	},
	
	doOnLoad: function()
	{
		if (Browser.onLoad.length > 0)
		{
			for(loadId in Browser.onLoad)
			{
				if (typeof(Browser.onLoad[loadId]) == 'string')
				{
					eval(Browser.onLoad[loadId]);
				}
				else if (typeof(Browser.onLoad[loadId]) == 'function' || (typeof(Browser.onLoad[loadId]) == 'object' && Browser.isIE()))
				{
					Browser.onLoad[loadId]();
				}
			}
		}
	},
	
	isIE: function()
	{
		return (navigator.userAgent.indexOf('MSIE') != -1);
	},
	
	scroll: function(positionY)
	{
		fullScrollTime = 100;
		amountScrolls = 50;
		
		Browser.scrollTo = positionY;
		Browser.currentY = posTop();
		
		if (Browser.scrollTo > Browser.currentY)
		{
			Browser.scrollDirection = 1;
		}
		else
		{
			Browser.scrollDirection = -1;
		}
		
		Browser.incrementAmount = Math.ceil(Math.abs(Browser.currentY - Browser.scrollTo) / amountScrolls);
		
		Browser.scrollInterval = window.setInterval('Browser.scrollIntervalCallback()', Math.ceil(fullScrollTime / amountScrolls));
	},
		
	scrollIntervalCallback: function()
	{
		if (posTop() != Browser.currentY)
		{
			window.clearInterval(Browser.scrollInterval);
			return false;
		}
		
		if (Browser.scrollDirection == 1)
		{
			// scrolling downwards
			
			if ((Browser.currentY + Browser.incrementAmount) > Browser.scrollTo)
			{
				window.scroll(0, Browser.scrollTo);
				window.clearInterval(Browser.scrollInterval);
			}
			else
			{
				window.scroll(0, Browser.currentY + Browser.incrementAmount);
			}
		}
		else
		{
			// scrolling upwards
			
			if ((Browser.currentY - Browser.incrementAmount) < Browser.scrollTo)
			{
				window.scroll(0, Browser.scrollTo);
				window.clearInterval(Browser.scrollInterval);
			}
			else
			{
				window.scroll(0, Browser.currentY - Browser.incrementAmount);
			}
		}
		
		Browser.currentY = posTop();
	},
	
	pageWidth: function()
	{
		return window.innerWidth != null? window.innerWidth: document.documentElement && document.documentElement.clientWidth ? document.documentElement.clientWidth:document.body != null? document.body.clientWidth:null;
	},

	pageHeight: function()
	{
		return window.innerHeight != null? window.innerHeight: document.documentElement && document.documentElement.clientHeight ? document.documentElement.clientHeight:document.body != null? document.body.clientHeight:null;
	},

	posLeft: function()
	{
		return typeof window.pageXOffset != 'undefined' ? window.pageXOffset:document.documentElement && document.documentElement.scrollLeft? document.documentElement.scrollLeft:document.body.scrollLeft? document.body.scrollLeft:0;
	},

	posTop: function()
	{
		return typeof window.pageYOffset != 'undefined' ? window.pageYOffset:document.documentElement && document.documentElement.scrollTop? document.documentElement.scrollTop: document.body.scrollTop?document.body.scrollTop:0;
	},

	posRight: function()
	{
		return Browser.posLeft() + Browser.pageWidth();
	},

	posBottom: function()
	{
		return Browser.posTop() + Browser.pageHeight();
	},
	
	getPositionEvent : function(e) 
	{
		e = e || window.event;
		
		var cursor = {x:0, y:0};
		
		if (e.pageX || e.pageY) 
		{
			cursor.x = e.pageX;
			cursor.y = e.pageY;
		} 
		else 
		{
			var de = document.documentElement;
			var b = document.body;
			cursor.x = e.clientX + 
				(de.scrollLeft || b.scrollLeft) - (de.clientLeft || 0);
			cursor.y = e.clientY + 
				(de.scrollTop || b.scrollTop) - (de.clientTop || 0);
		}

		return cursor;
	}
};

window.onload = function()
{
	Browser.doOnLoad();
}