/*!
	 * JS Redirection Mobile
	 *
	 * Developed by
	 * Sebastiano Armeli-Battana (@sebarmeli) - http://sebarmeli.com
	 * Release under the MIT licence
	 */	
	/*
	Copyright (c) 2010 Sebastiano Armeli-Battana (http://sebarmeli.com)

	/*
	 * @param config containing two fields: param (parameter to be passed to avoid
	 *             mobile redirection), mobile_prefix (prefix appended to the 
	 *             hostname), cookie_hours (number of hours cookie needs to exist after
	 *			redirection to desktop site)
	*/
	jQuery.noConflict();
	function sniffer() {
		
		// Helper function
		var addTimeToDate = function(msec) {

			// Get the current date
			var exdate = new Date();

			// Add time to the date
			exdate.setTime(exdate.getTime() + msec);

			//Return the new Date
			return exdate;

		};
					
		// Retrieve the User Agent of the browser
		var agent = navigator.userAgent.toLowerCase(),
		
			// param value or default value
			param = "preferFullSite",
			
			// Constant
			TRUE = "true",
		
			// "m" is the default mobile hostname prefix 
			mobile_prefix = "m",
			
			// URL host of incoming request
		    host = document.location.host,
		
			// Compose the mobile hostname
			mobile_host = mobile_prefix + "." + 
							(!!host.match(/^www\./i) ?
								host.substring(4) : 
									host),
			
			// Expiry hours for cookie
			cookie_hours = 1,
		
			// Check if the UA is a mobile one (iphone, ipod, ipad, android, blackberry)
			isUAMobile =!!(agent.match(/(iPhone|iPod|iPad|blackberry|android|htc|kindle|lg|midp|mmp|mobile|nokia|opera mini|palm|pocket|psp|sgh|smartphone|symbian|treo mini|Playstation Portable|SonyEricsson|Samsung|MobileExplorer|PalmSource|Benq|Windows Phone)/i));
		
		// Check if the referrer was a mobile page of the site
		// (in that case we need to set a variable in the sessionStorage or in the cookie)
		if (document.referrer.indexOf(mobile_host) >= 0) {
			if (window.sessionStorage) {
				window.sessionStorage.setItem(param, TRUE);
			} else {
				document.cookie = param + "=" + TRUE + ";expires="+
													addTimeToDate(3600*1000*cookie_hours).toUTCString();
			}
		}
		
		// Check if the sessionStorage contain the parameter
		var isSessionStorage = (window.sessionStorage) ? 
								(window.sessionStorage.getItem(param) === TRUE) :
									false,
			
			// Check if the Cookie has been set up
			isCookieSet = document.cookie ? 
							(document.cookie.indexOf(param) >= 0) :
								false;
								
		// Check that User Agent is mobile, cookie is not set or value in the sessionStorage not present
		if (isUAMobile && !(isCookieSet || isSessionStorage)) {
		   var q = window.confirm("Would you like to visit the Mobile Site?");
		   if(q) { window.location.href = "http://m.ttiinc.com" }
		   else { 
		     if (window.sessionStorage) {
				window.sessionStorage.setItem(param, TRUE);
			 } else {
				document.cookie = param + "=" + TRUE + ";expires="+
                  addTimeToDate(3600*1000*cookie_hours).toUTCString();
			}

		   }
		} 
	}
	
	sniffer();